Hi,
I've just upgraded to Unity 4.2, and I encountered an issue causing one of the demo fonts to not display properly. At present I'm only using a single font throughout my app, so this is all I noticed it on - UIDemoOldSansBlack. I opened the sprite collection and the BM Font had been cleared causing the entry to appear as "Empty". Due to the font missing in the sprite sheet it appeared in the game/editor as shown in the attachment.
I've reset the link, committed and all appears fine again, I just wonder what could have caused this?
Many thanks,
Jamie