On the Obi110 system with GV accounts on both SP1 and SP2, SP1 was using profile A and SP2 was using profile B. I retested after changing SP2 to profile A. To make the change stick, I had to disable ObiTalk configuration. What ever problem exists seems to now be hard embedded in the database. The MWI is stuck on and can not be cleared either through archiving all new messages or even manually clearing the flag using the web interface. Very perplexing. For now, all phones are stuck with a blinking MWI LED even after disabling the feature on both lines.
My other Obi110 system using a single GV account still has acceptable MWI operation. I have noticed that the message wait indicator led does not light until after the phone has been taken off hook for the first time after GV has successfully set the MW flag bit. I can leave a GV voicemail, wait 3 minutes and note that the MW LED is not lit. Going off hook I will hear interrupted dial tone correctly showing MWI and upon going back on hook, the LED will start blinking.