Hello all, been skulking around here in the background reading the threads and waiting for a problem to come up and now I have one. I am trying to "install" plpgsql on one of my databases. When I run the command 
 
createlang plpgsql database1
 
I get this error message
 
ERROR:  Load of file /usr/lib/pgsql/lib/plpgsql.so failed: /usr/lib/pgsql/lib/plpgsql.so: undefined symbol: CurrentTriggerData
createlang: language installation failed
 
any ideas?