Just brought Nokia Asha 308 and while trying all apps in it saw that while signing in my Nimbuzz account i get an error message that y phone doesn't have enought memory to run the app. Tried restarting so that if it may be a RAM issue, still the result was same. By the way my phone has 20 MB free and memory card has 1.2 GB free, Tried updating "Nimbuzz" version too.
It looks like your roster size (contact list) is not capable of loading in the asha 308 phone. can you tell me your nimbuzz username ? (add mine : ravindran2454)
you can login to other clients (say PC client) and remove your Facebook / Gtalk from Nimbuzz, and try to sign in to the asha nimbuzz application. and then try to add communities (FB / Gtalk)