Official Statement about Warden

Blizzard recently started to ban people for the use of modified Skills.txt, ANIMDATA.D2 and CHARSTATS.TXT. Also they started flagging people for the use of cGuard, which is D2BS's anti-detection.

So if you've used D2BS lately I suggest you to xfer your items off with a clean Diablo II installation. If you lost your D2 CDs you can download it from Blizzards store. McGod made a nice guide about it which you can find here.

You can expect a new cGuard release this weekend, which will contain preemptive anti-detection code aswell.