I am having the same problem of FREEZING or moving VERY slowly in the Rise of Atlantis and Atlantis Quest but not in other games. It's worthless to play the last level in Atlantis Quest because you don't get many matches and within 6 or 7 plays on each board you lose the match and also lose a life. It defeats the purpose of the third level, there's no use bothering to try. I love playing these games but hitting a stone wall every time you get to level 3 is extremely frustrating.
I am a paid member of Club Pogo and been having constant problems in all 8 games I play and giving Pogo $39.99 for membership seems redundant when you can't get into some games and the constant pop-ups of Java and Security problems stalls my favorite games.