I'm actually a little frustrated with Calibre right now -- just tried to convert some epubs to mobi yesterday, without luck (neither Cybook nor FBReader seem to like the files). A lot of the frustration is that I couldn't compile Calibre for Fedora 10 (without messing with my KDE install, as it wants qt-4.4.4, which isn't yet released on F10; btw, the release notes are not correct -- the package is qt, not qt4). So I had to try the Windows version, and using Windows sets my teeth on edge. (I'm just that way, I'll tone it down, promise.)
I figured that in the mean time, I'd just do an epub->lit conversion, but that didn't seem to work (Mobi, ePub, LRF, despite choices elsewhere for one-at-a-time conversion). The lit->mobi conversions using clit/mobiperl work wonders every time I've tried 'em.
Is epub->lit just not implemented yet? I was using the version released 10 Feb 2009; I don't have Windows running, so I don't have the version number I used handy.
(Right now, I'm just looking for converters, or easily digestible info for doing the requisite xhtml conversions so I can feed things to mobiperl and have things work nicely. I'm also not a python person, as I tend to code in perl or ruby instead. So... python on windows, ouch; but as I say, that's me. I'm also lazy, otherwise I'd study the specs and write my own, but that's too much like my day job at times.)
Is there a way to just build the command-line tools and avoid Qt, and hopefully provide some decent bug reports rather than making an overly whiny post?