Well, I went to use my HTC Desire Z today and... all the texts have gone again
I didn't have HTC Sense on it, so it's not that.
I bought it through dialaphone but since people have had trouble getting any common sense out of HTC themselves then clearly there's no point doing that.
I last backed up with MyBackupPro a couple of days ago, and have also had SMS Backup running, but while it says it last did a backup at 8pm last night, I go to restore and... "The application SMS Backup+ (process.com.zegoggles.smssync) has stopped unexpectedly. Please try again".
It's done that three times, the latest one after switching the phone off and on again just in case that helped.
Is there anything that works automatically, or shall I just have to use MyBackupPro daily and hope it doesn't delete them before I do it?