We are doing internal testing in order to determine the cause of this issue and provide a solution. There is no a conclusion so far. We acknowledge that some users are getting in trouble with some cards but in the meantime we have done intensive testing on cards and processes that haven't caused or suffered any problem. Please keep reporting at http://bugs.maemo.org/show_bug.cgi?id=1204 any details about affected cards: the specific type of card affected and the processes you were doing when you encountered the problem and before. These details are more than helpful to define the problem and fix it. We will communicate here and in the bug report any progress.