Wirelessly posted (BB 11020)
If you at least tell callers why their text messages disappear I'll be happy. I've seen too many people come here after talking to tech support and having their devices exchanged under warranty and then having the same problem.
There is a more permanent fix, though, and maybe you can use this on your calls: the new Curve 8900. I don't even bother with this anymore since I have tons of apps and still over 100MB free.
