Sudden high data usage

Does anybody else have the problem, that their data usage practically exploded since the last update?

I only noticed cos I got a SMS with a warning, that I used nearly 1GB of data since the middle of December. Which is really unusual and never happened before. Usually have tons of MB left at the end of the month.

I checked my apps and it was AB2 that nearly used 1GB over the last 4 weeks!!! Compared it with the previous months and the usage really exploded

13 Oct-12 Nov 23MB

13th Nov – 12.Dec 46MB

13 Dec – 12 Jan 995MB

And today I already used 30 MB !?! Playing for 60min !?!

During the previous months I played on a daily basis,too. I didn´t change my playing habits at all.

Would reinstall in case it´s a bug but I don´t have a FB account :-((((