I was trying to see if JCapPM (in PM 5.8.1) would let me browse my folder with lots of panorama.
When I clicked on the next image I received the out of memory message.
Then I realized that the *.txt & the description.txt have disappeared.
I had the same problem yesterday but didn't realized then that I had lost my description files and had to recreate them by hand.
Ok, I succeeded to reproduce it after having launched JAlbum with only very few MB.
When the OutOfMemoryError occurs, the caption and the description is not loaded for this photo since it can't be displayed. So, when you jump to another photo, the empty caption and description overwrite the existing one which results in a deletion of it.
So, it would be better to load the caption and description even when the photo couldn't be loaded and the problem is gone. Will be fixed for the next version.