Hello Brian,
I have just checked everything out...And everything is and has been working perfectly here...I checked out your bidding problem, and no problem on this end...you actually do have a bid on an item in place right now:
http://www.jackpotauctions.com/cgi-bin/12345.pl?chips&1003601946
On this particular auction...the previous bidders "proxy bid" exceeded your bid...that's why you are not the current leader of that auction.
If you ever have any problems, let me know the item# of the auction that you are having trouble bidding on, and I will be happy to check it out.
Best Regards
JackpotAuctions.com