Its never good when your dive watch is giving you bad info!
Pelagic Pressure Systems is recalling some 2,800 of its Oceanic and AERIS digital dive computer watches, citing a possible decompression hazard for divers relying on them (the exact models affected are listed on the CPSC page linked below). The problem occurs when switching from one gas to another during a dive, which apparently has the dangerous side effect of locking up the watch’s display, leaving the diver uncertain of his or her dive time. That could either cause them to enter decompression unknowingly or ascend prematurely, resulting in the serious problem of decompression sickness. While there’s been two reports of defective watches, they apparently haven’t resulted in any injuries. Those with the watches won’t have to do without them for long, however, with a trip to an authorized Oceanic or AERIES dealer for a software upgrade the only fix needed.
From Engadget