You were right. This issue was caused by my fonts. Here is what I got in Console.app:
Code:
19/01/11 22:56:41 calibre[55212] Error loading /Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types: dlopen(/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types, 262): no suitable image found. Did find:
/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types: mach-o, but wrong architecture
19/01/11 22:56:41 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] calibre: OpenScripting.framework - scripting addition "/Library/ScriptingAdditions/Adobe Unit Types.osax" declares no loadable handlers.
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Fontconfig error: Cannot load default config file
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Bold'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Bold'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Italic'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Italic'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Italic'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Italic'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Bold'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Courier'
19/01/11 22:58:05 [0x0-0x6d56d5].net.kovidgoyal.calibre[55212] Error: Couldn't find a font for 'Times Roman'
There was no missing font. Instead, some of them were duplicated. I just had to open Font Book.app and resolve the conflicts. Now everything is fine.
I really wonder how these duplicate fonts got here. I suspect Office 2008 but this is just an assumption.