There's a potential data loss in Tellico 1.1pre2. If the config option for saving images in the file vs. the app directory gets flipped, and then the file is saved, the zip file gets overwritten before the images in the cache are updated, resulting in a loss of those images.
My poor programming skills, and too hasty code changes are the blame, of course. I'll have another pre-release here shortly, and I hope everyone is making backups. But I know there are plenty of folks who aren't, and I'm terribly sorry.
Current SVN should have the hole fixed, and I believe I've tested all the corner cases. But as always, make backups!