i have been using my canon s2 for the last two months and have not had any problem so far. but yesterday, when i switched the camera on, i got an error message " memory card error". i was shocked and switched off the camera immediately. when i powered it on again after five minutes, it worked fine from then on with no error message the whole day.

can anyone explain what is this error and why it could have occured? is it due to some camera malfunctioning? has anyone else got this error? please enlighten me.