No you guys are not the only ones. I had the same problem with my vzw 6800 after my last flash. Ended calling VZW and they sent a replace phone, but between calling and getting the phone I found this link by searching here and xda forums.
http://forum.xda-developers.com/show...arching+signal
I followed this: It worked for me and I sent the replacement phone back to VZW.. did not need it.
Quote below.. from above link...
There's a whole thread devoted to this right here somwhere...
You need to do the following:
phone app, dial *22803 or *22802 (whichever one gets you a signal) and hit phone hang-up when you get a signal and it says it's starting to program. Now that you have a signal do the next step.
phone app, dial ##778
select "EDIT" and enter the 000000 unlock code
select "VIEW INFO" and select "M.IP Settings"
Edit MIP_MODE and change to something else, then go back and change it again back to "Mobile IP Preferred".
Do the smae for MIP reg retried, retry timeout and pre-registration timeout.
Change all the values, ok, then change them again back to the original setting.
Settings are: Mob IP Pref, 2 retries, 1750ms retry timeout, 0 pre-reg timeout.
When you're all done save and exit - soft-resets your phone.
You should be good after this.
Good luck!