[spitzilla]

I noticed im having that same problem with the ringer. Even with using one of the ringtones cooked into the ROM, im not sure what triggers it but after a while I will recieve a call and the phone will remain silent even though everything is on high volume.
Resetting the ringtone and rebooting the phone seems to fix the issue for a little while.

I also noticed the jpg issue. When recieving a jpg from email or other source, you are unable to view it unless you put it in your camera picture directory so the album viewer picks it up and displays it. This is rather irritating.