Everytime you update your OFW you have to reformat your SD Card for your console to recognize it once again...
PS
Prior before you used any CFW on your console. Did you create a NAND Backup and restored it prior to you updating to OFW v6.0.1?
Thats complete crap, Its NEVER happened to me after an update!
Also im UK and got banned a while back, think it was due to playing nsps