I'm playing GSCS in the standalone Flash player per the instructions posted by tom0815 on this thread. The standalone player enables true fullscreen, and I've yet to experience any lag or other problems using it. The one small drawback is that you have to recopy the information in tom0815's post when Armor Games calls upon you re-login.
yeah i have the same problem occasionally, its like a ghost of the gem, i just end up ignoring it and working around it. can be a bit of a pain if you have to remember what Gem is behind it, as they fill in as you dupe or create new ones.
