Dell started recalling those batteries...
http://news.yahoo.com/s/ap/20060815/...battery_recall

There's a nice thread already on Dell's forums here:
http://forums.us.dell.com/supportfor...ssage.id=43162

And from what they say, you can check if your battery is on the recall list here:
https://www.dellbatteryprogram.com/


Have fun with those batteries :P