weird, it happens to me on 2 different computers. this is the error.
"jtablesession::Store Failed
DB function failed with error number 1062
Duplicate entry 'vskg29gpie4gd9otd8g3cq7q52' for key 1 SQL=INSERT INTO `jos_session` ( `session_id`,`time`,`username`,`gid`,`guest`,`client_id` ) VALUES ( 'vskg29gpie4gd9otd8g3cq7q52','1283332977','','0','1','0' )"