[Freeswitch-users] Cisco Java phones crash when nonce count is incremented past 1 -- any ideas?

Hello all, I have several Cisco Java powered phones (7941, 7961, 7965) that repeatedly drop calls. The issue seems to be that once the phone attempts to update the nonce count to 2, it crashes and disconnects the call. Has anyone seen this behavior before? Any suggestions for how to fix this would be greatly appreciated. Thanks, Graham