> I tried to increase the block size from 8K to 32K and received a IPC
error.
> Now IPC is compiled into the Kernel so why would I get this error. I
> switched it back to 8K and it runs fine.
Did you dump your database(s) before the change and initdb/reload them
after? I presume this is needed and could wreak all sorts of havoc if you
don't. Also there is a script 'ipcclean' that is supposed to reinitialize
some stuff to do with IPC. (yes that is vague but its all I know).