Doesn't seem to be the same problem as I had, but maybe the same solution works... worth a try, anyways.
Since yesterday I couldn't log into any mobage games anymore. Either it just stopped loading at stage "preparing fantasica", or it would say "this application requires a working network connection" (don't know if these are the exact words, but you know what message I mean).
I uninstalled and reinstalled, I deleted the cache, I even did a factory reset, without success. But when Evernote refused to open too, I got on the right track.
Soooo long story short, please check how much space you have left on your phones internal sd storage (not external SD). Mine was nearly full (and here I thought I had been using the external SD only). So when I went and formatted the internal SD (remember to make a backup of all that's dear to you like pictures).... ta-da!
Since then I'm on again.