Cannot import photos

Zantroplets

I've only just started on Smugmug, so still on the trial days.
I've uploaded lots of pics and galleries, but now I can no longer drag and drop photos into the Add Photos area, ready for uploading. Neither drag and drop or Add Photos tab actually enables me to put photos in there anymore.
Am I doing something wrong, or is there some bug in the system?

PBolchover

It sounds as if your Java has got its knickers in a twist. Try deleting your browser cookies and temporary files. If that doesn't work, try rebooting your computer...

Andy

Yes, and write our heroes if you get stuck - http://www.smugmug.com/help/emailreal we'll help!