Bought my 5th dstwo card and got it in the mail yesterday. I formatted the OS that came with it straight up using sd flash program. Reloaded the latest os with firmware and updated usin my dsiXL that's running v4.0 firmware. Loaded afew roms and it's running fine. Have never had an issue with my...
I've got 2 dstwo cards, mine is 2 and a half years old and my g/f's is 2 months old and have just updated to 4.5.0-10 update and no issues with it. Runs normally and haven't got the issues your stating. Maybe it's the type of microcard your using or dirty contacts