Problem with Calibre

[ntk14]

Hi,
I got a problem with my Nook STR, last time when I used the old version of Calibre to convert .prc to .epub, I use extra css :
@font-face {
font-family: "DroidFont", serif, sans-serif;
font-weight: normal;
font-style: normal;
src: url(res:///system/fonts/DroidSerif-Regular.ttf);
}
@font-face {
font-family: "DroidFont", serif, sans-serif;
font-weight: bold;
font-style: normal;
src: url(res:///system/fonts/DroidSerif-Bold.ttf);
}
@font-face {
font-family: "DroidFont", serif, sans-serif;
font-weight: normal;
font-style: italic;
src: url(res:///system/fonts/DroidSerif-Italic.ttf);
}
@font-face {
font-family: "DroidFont", serif, sans-serif;
font-weight: bold;
font-style: italic;
src: url(res:///system/fonts/DroidSerif-BoldItalic.ttf);
}
body {
margin-right: 8pt;
font-family: 'DroidFont', serif;
}

And I can read Vietnamese on my Nook, but now when I upgrade Calibre to 0.8.36, I do the same input some CSS - but I can not read Vietnamese on my Nook, the font is error it has some strange character likes : ? ...

Anyone can help me? My Nook still can read the old eBooks that I converted last time in Vietnamese. So my Nook is no problem (I guess), all the problem is the conversion in Calibre.

Thanks in advance

[Wordsworth]

Best and easiest thing to do is revert back to previous version. I have the last five or six versions stored in my downloads folder in case I have problems. I don't do the css stuff like you do, not experienced enough. Just convert books to epub for my Kobo wifi.
Quite several versions ago was quite suitable for my needs. I don't need all the advanced features.
The program as it stands is excellent and I think Kovid is an absolute genius.

[tdonline]

Yeah, sometimes the upgrades has cons along with the improved features. If a version is working for me, I stick with it for a bit.

[azazel1024]

Not that it helps with your issue, but yes, sometimes things break. The last version I was getting some epub decoding errors and the only way to fix them were to convert epub->epub and it worked, not that it was something I wanted to do. The latest version fixed the issue (one of the bugs they were fixing).

Only time I have had anything break from an update though.