Ciao, mi accodo a questa discussione perchè ho un problema simile che però non sono riuscito ancora risolvere.
Uso blogspot e scrivo le tabelle con immagini in background nella maschera di compilazione "HTML" di blogger e fin qui tutto bene basta che io clicco direttamente su "Aggiorna" ed il risultato è quello che voluto.
Vorrei però poter modificare il post (per le descrizioni in esso contenute) direttamente dalla maschera di compilazione "SCRIVI" ma quando ritorno alla pagina HTML il codice che avevo precedentemente caricato si modifica ed il risultato a video non è più quello di prima.
di seguito il codice "funzionante" a dovere:
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<table border="1">
<tbody>
<tr>
<td rowspan="6" style="background: url(//lh6.googleusercontent.com/-Lojh0WvXji0/VMYDI3GB_0I/AAAAAAAAZgw/VFU4Ie7bPsY/w349-h833-no/Lista%2Bdella%2Bspesa.png) no-repeat; background-size: 97%" width="300">
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<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"><b>La lista della spesa</b></span></span></i></div>
<div style="text-align: center;">
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<b><span style="font-family: "Trebuchet MS",sans-serif;">  Per l'impasto</span></b><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 300gr di farina</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 2 cucchiai di lievito in polvere</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 160 gr di zucchero</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 100 gr di burro freddo</span><br />
<b><span style="font-family: "Trebuchet MS",sans-serif;">  Per la farcitura</span></b><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 800 gr di mele Boskop o altra varietà </span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">     succosa tipo Fuji</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 1/2 cucchiaino di cannella in polvere</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 1 bustina di zuccheto vanigliato</span><br />
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<br /></td>
<td height="95" style="background: url(//lh6.googleusercontent.com/-AdwdtIZCgK4/VMYDI9csPTI/AAAAAAAAZgo/PfQ8t68JfNc/w285-h165-no/Preparazione.png) no-repeat; background-size: 50%" width="290">
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<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>30'</b></span></span></i></div>
</td></tr>
<tr><td height="95" style="background: url(//lh6.googleusercontent.com/-iOaNM-7Po9o/VMYDItRrelI/AAAAAAAAZgk/PhGsR9QMlyg/w285-h165-no/Cottura.png) no-repeat; background-size: 50%" width="290">
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<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>40'</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background: url(//lh6.googleusercontent.com/-GGDecLJPn5U/VMYVe8F1DXI/AAAAAAAAZho/_0rUksbDfBk/w256-h148-no/Congelatore.png) no-repeat; background-size: 50%" width="290">
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<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background-size: 50%; background: url(//lh6.googleusercontent.com/-ZdUSVC_OBYw/VMYVe-0ppKI/AAAAAAAAZh4/Y7yQBFOtMdY/w256-h148-no/Frigorifero.png) no-repeat; background-size: 50%" width="290">
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<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background-size: 50%; background: url(//lh5.googleusercontent.com/-hY30aayi2yc/VMYVlmbzPEI/AAAAAAAAZiM/QjixhRKKbBY/w256-h148-no/Marinatura.png) no-repeat; background-size: 50%" width="290">
<br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div></td>
</tr>
<tr><td height="140" style="background: url(//lh3.googleusercontent.com/-zdFevAqjFUk/VMYvMIt8jpI/AAAAAAAAZi4/kZYw9pJixi0/w803-h411-no/Consigli%2Bdel%2Bcuoco.png) no-repeat; background-size: 100%" width="290">
<br />
<div>
<i><span style="font-size: normal;"><span style="font-family: "Trebuchet MS",sans-serif;">  Potete guarnire la torta con</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  meline sciroppate in scatola,</span><br /> <span style="font-family: "Trebuchet MS",sans-serif;">  reperibili nei migliori supermercati.</span></span></i></div></td>
</tr>
</tbody></table>

Se passo alla maschera "SCRIVI" l'anteprima è completamente sballata ed il codice è cmbiato cosi:
<br />
<table border="1">
<tbody>
<tr>
<td rowspan="6" style="background-size: 97%; background: url(//lh6.googleusercontent.com/-Lojh0WvXji0/VMYDI3GB_0I/AAAAAAAAZgw/VFU4Ie7bPsY/w349-h833-no/Lista%2Bdella%2Bspesa.png) no-repeat;" width="300"><br />
<br />
<br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"><b>La lista della spesa</b></span></span></i></div>
<div style="text-align: center;">
<br /></div>
<b><span style="font-family: "Trebuchet MS",sans-serif;">  Per l'impasto</span></b><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 300gr di farina</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 2 cucchiai di lievito in polvere</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 160 gr di zucchero</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 100 gr di burro freddo</span><br />
<b><span style="font-family: "Trebuchet MS",sans-serif;">  Per la farcitura</span></b><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 800 gr di mele Boskop o altra varietà </span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">     succosa tipo Fuji</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 1/2 cucchiaino di cannella in polvere</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  » 1 bustina di zuccheto vanigliato</span><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br /></td>
<td height="95" style="background-size: 50%; background: url(//lh6.googleusercontent.com/-AdwdtIZCgK4/VMYDI9csPTI/AAAAAAAAZgo/PfQ8t68JfNc/w285-h165-no/Preparazione.png) no-repeat;" width="290"><br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>30'</b></span></span></i></div>
</td></tr>
<tr><td height="95" style="background-size: 50%; background: url(//lh6.googleusercontent.com/-iOaNM-7Po9o/VMYDItRrelI/AAAAAAAAZgk/PhGsR9QMlyg/w285-h165-no/Cottura.png) no-repeat;" width="290"><br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>40'</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background-size: 50%; background: url(//lh6.googleusercontent.com/-GGDecLJPn5U/VMYVe8F1DXI/AAAAAAAAZho/_0rUksbDfBk/w256-h148-no/Congelatore.png) no-repeat;" width="290"><br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background-size: 50%; background-size: 50%; background: url(//lh6.googleusercontent.com/-ZdUSVC_OBYw/VMYVe-0ppKI/AAAAAAAAZh4/Y7yQBFOtMdY/w256-h148-no/Frigorifero.png) no-repeat;" width="290"><br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div>
</td>
</tr>
<tr><td height="95" style="background-size: 50%; background-size: 50%; background: url(//lh5.googleusercontent.com/-hY30aayi2yc/VMYVlmbzPEI/AAAAAAAAZiM/QjixhRKKbBY/w256-h148-no/Marinatura.png) no-repeat;" width="290"><br />
<div style="text-align: center;">
<i><span style="font-size: large;"><span style="font-family: "Trebuchet MS",sans-serif;"> <b>---</b></span></span></i></div>
</td>
</tr>
<tr><td height="140" style="background-size: 100%; background: url(//lh3.googleusercontent.com/-zdFevAqjFUk/VMYvMIt8jpI/AAAAAAAAZi4/kZYw9pJixi0/w803-h411-no/Consigli%2Bdel%2Bcuoco.png) no-repeat;" width="290"><br />
<div>
<i><span style="font-size: normal;"><span style="font-family: "Trebuchet MS",sans-serif;">  Potete guarnire la torta con</span><br />
<span style="font-family: "Trebuchet MS",sans-serif;">  meline sciroppate in scatola,</span><br /> <span style="font-family: "Trebuchet MS",sans-serif;">  reperibili nei migliori supermercati.</span></span></i></div>
</td>
</tr>
</tbody></table>

a tutti gli url ho tolto "https:" (se si vuole fare una prova del codice occorre reinserirlo)
Spero in un aiuto:?