Pidgin: crash on awaken from sleep

I have a problem with pidgin whereby it won't start via the portable apps menu:

Throws : error loading pidgin.dll error (1114) a dynamic link library (DLL) initialization routine failed

So I go into the apps directory and start it manually and it runs happily.

When I resume the computer from sleep, it always crashes.

Running (unfortunately for me) Vista Home Preumium (it's totally rubbish!) 32bit
on
Acer Aspire 9300 laptop with 2gb ram