I have my 8330 Telus curve running on Nathanix's latest hybrid 5.0 OS.
I already have an existing problem in which I sometimes do not receive texts (I assume it's a carrier problem, not the hardware, as this also happened when I had an LG Shine with Telus).
Now, when I go through a text thread and scroll up to read previous conversations and then scroll back down, I noticed that some texts are missing (which were there before; I have not deleted anything). In addition, when I exit the thread to go back to the SMS list and try to open that particular thread I previously looked at, I cannot open it. I can open the other threads to read them, close them and reread them fine. I did plenty of battery pulls. I can go look at the first conversation I opened up once and then I can't look at it again. =S
I also have a nathanix hybrid. I'm not having any problems. I have V4 which do you have? Maybe something went wrong with the install. May want to wipe and reload. I know that's not what you want to hear but I don't know what else to say.