There is an older thread in the Bugless Beast forum but I have had this problem using several ROMs so I am creating a new thread here. Whenever my phone is rebooted or I go from wireless back to 3g, this problem may pop up. I would estimate that it happens to me 30% of the time. I can fix the problem by switching to airplane mode and back again or rebooting. I am trying to figure out if this is a Android problem, Kernel problem, or baseband problem.
By the way, if you are not familiar with this problem, I would recommend that every time you reboot or go from wireless to 3g, you check to see if you have this problem. To check, go to settings, about phone, battery use and then press Cell Standby. You will see "Time On," and may or may not see "Time without a signal." I don't know why sometimes it displays "Time without a signal" and sometimes it doesn't.
I am curious to see if someone knows the cause of this and if other people are still experiencing this.