upgrade 8.0.4 to 8.1.4 breakage

fedora core 2, upgrade from 8.0.4 -> 8.1.4 via RPM

I've just upgraded, everything /seemed/ to go swimmingly, but now i
cannot connect via PHP. I can connect fine through psql, and all my
tables have been restored fine.

Using PEAR MDB2 wrappers (MDB2-2.0.3). Has anyone else seen this? Is
this a PEAR issue?

A similar upgrade on fedora core 4 went very well. The only difference
there was it was done from source. Any debugging advice accepted.

brian