Folks, if you haven't upgraded to iFile v 1.7.0-1, please avoid upgrading for now pending a newer release. As you can see from the developer's twitter account, several people (including myself) have issues with the registration of the device even though we've paid for it and can verify that on Cydia. That means that you can't use features like Dropbox or tabs because those are for registered (i.e. paid) user. He's working with people to sort it out but it's probably best not to upgrade for now.