"file is already in use or was left open..."

I'm not sure if this is a recent change or something I messed with accidentally, but here goes. If I open a folder in Bridge, then open an image file in Photoshop, I am unable to save any changes without getting the "this file is in use" dialog. The only way I can save is if I actually highlight a different file in Bridge; to my knowledge this hasn't been a problem until now. Is there a setting anywhere that I can adjust to disable this feature, that is, be able to save a file in Photoshop even though it's highlighted in Bridge?

Thanks.