Can't "Charge Only" When Connected to USB

I recently upgraded to the Nexus from the Bionic. So far I am very pleased with the device. Of course I had to root it and Rom it with Eclipse almost immediately. It's so nice to run ICS with everything working! Anyway the one issue I am having is I cannot connect to USB in a charge only mode. When I try to uncheck the media mode box it does nothing. I can't even eject it from windows as there is no "safe to unplug" dialog. It show up as a drive and transfers are fine, but sometimes I just want to charge without being connected as an active drive. I'm not sure if this is an Eclipse issue or an Nexus/ICS issue. Anyone else have this problem? If so any way to fix it? Thanks for any help..