I have rebuilt and rebuilt, once every couple of days.  This has been  
going on for a while.  I was using CentOS but I switched to Ubuntu to  
try to build against some newer libraries.  I thought the problem was  
resolved but it is very intermittent so its hard to tell.  The gdb  
output is at http://pastebin.freeswitch.org/12451  The Freeswitch  
process just seems to randomly start using 100% of the CPU and stop  
responding about once every 12-36 hours.  Today it had to be restarted  
twice, somedays not at all, very light load, about 100 calls per day.