That is important information. We (developers) need as much circumstances as you can give. I know this is difficult for us end-users, as it seems so obvious. However, for those developers with many many topics on their desk, it is important to track and narrow down your circumstances as much as possible. Therefore, I would update my posts on Nokia Discussions with that informations:
Nokia 500, Belle Refresh, hard reset done
Java MIDlet with a lot of text input (like x, y, z) close after around x minutes.
The last step I did was entering text / looking at text?
… and so on. Again, I was not able to reproduce it here on my Nokia Belle Refresh.