Well I got Gaim 0.72 working now so thanks for your help.
Installed gtkspell at the command line, even though it looked like it had fouled up.
Removed the old Gaim using the Redhat add/remove apps utility.
Installed Gaim 0.72 at the command line and low and behold it all works perfectly (for now).
(This time yesterday I couldn't even get my external floppy to mount let alone sort out my winmodem!)