i recently purchased a curve and about every week it happens to clear out my text message inbox and some of my emails. for the last few days messages get deleted as soon as the backlight turns off. anyone know what is going on?

Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8300/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)

Check your avaialable device memory on the handheld.
You're probably running low which causes call logs and old messages to automatically purge.

This issue is memory. I had the same problem after I installed a large application. No more problmes since I cleared my browser cache and removed some applications I wasn't using. Here's a link from RIM


BlackBerry Search Results

And here is some info from your friends here at BBF:

Why is my BlackBerry losing its call logs or message logs? - BlackBerryFAQ

How do I free up memory on my device? - BlackBerryFAQ