I have tried unsuccessful to reproduce the problem that you described. I used Elements Organizer 12 on Windows 7 Professional SP1 64 bit.
I have not found any specifications for that Note option under Information in the Elements Organizer 12. Wondering if there is a word count limit for the feature, I would ask "How many words did you use in your Note for each of the Elements Organizer 12 thumbnails?" I used about 50 words for each.
The longest one I could find is 39 words 235 characters.
I was saving them in Excell before I tried PEO.
If there was such a limit, it would be okay to stop accepting characters into the field.
It is not as good to accept them and then not keep them, or crash.
In my case the fileds were entirely blank again.
I will work on this some more in the morning.
At this writing all my Premiere Elements 12 Information Notes are retained.
I am not sure how much of a help the following will be, but, as for general information, did you know that
you can write notes within a project using unnumbered markers?