Many people have been journeying through Pandora starting quests, obtaining loot, and completing challenges to increase their Badass rank in Borderlands 2, but a potentially major problem has recently surfaced. Some reports have come in that the Badass rank has been reset while challenges remain marked as completed, which means no chance to regain the rank for current characters. Even more troubling is the loss of customization skins and heads, even though the rewarding challenges show them as completed. The reset bug has affected Borderlands 2 gamers on the PC, PS3, and 360, so it is not specific to any one platform. Gearbox's engineers are currently trying to fix the bug, as community manager Chris Faylor reported the following:
Thanks for all the reports and specific details, folks. Our engineers are looking into this, and the information you've provided has proven to be a great resource while we investigate. At the moment, it seems to be a fairly rare issue and we'll keep you updated on when we resolve it.
If you are affected by this bug, the best thing to do is just sit tight and wait for a fix. It's unfortunate this happened, but hopefully Gearbox can patch it and restore the lost rank and customization gear.