I keep playing with bfgminer 5.5.0 and my antminers, but it does not appear to be stable. After 10-15 minutes I get a segmentation fault.
Tried 5.4.2 & 5.5.0 via gentoo distribution, and a hand compiled 5.5.0. All behave the same.
Any suggestions?
Run it in gdb and/or valgrind and report a backtrace.