It's been nearly a week since using this rom. But recently, after reboots, apps installed on the sd card have been disappearing. When I install missing apps through titanium it processes but says it will overwrite the existing app. So it's still there but not visible, like it's just based off a report log that didn't record the uninstallations or disappearance.
I found on a moto droid forum that the person deleted the contents of .android_secure on the sd card to remedy the problem. But he/she also wiped and reinstalled the rom. I will let you know if deleting the folder contents are good enough.
But is this related to the rom? I did not wipe because, as stated in your notes, users have reported no problems installing without wiping.
It's worth mentioning that when on the previous rom (RodimusROM) whenever I moved an app to sd it would pop up an error message that it couldn't be moved to the sd. But after trying again it worked and moved to sd. I'm guessing this was because of that error and being carried over to this rom brought the problem along.