Three months after their first on-sale attempt and about six weeks after a successful test, Comic-Con International, their new partner TicketLeap and fans trying to buy tickets to this summer's convention in San Diego are being plagued with more difficulties this morning.

Registration opened at 9 a.m., and while the Comic-Con site seems to be operating fine, TicketLeap has been displaying a message that says "We are currently over capacity. Try again momentarily," since about that time -- and it's currently being displayed as I keep hitting refresh.

Shortly after 9 a.m., TicketLeap posted on Twitter, "@Comic_Con fans, if you see an over capacity message hit refresh. We are under heavy load right now and it should smooth out." You can see some of the reactions from potential con-goers on Twitter as well; some say they have been able to get into the site to buy tickets, but it seems to be the minority.

Not including the test on Dec. 15, where 1,000 tickets were sold, this is the third time tickets for the San Diego Comic-Con have gone on sale. Attempts to sell them on Nov. 1 and Nov. 22 were also met with problems.

Update, 9:50 a.m.: CCI posted on their Twitter feed: "We’re obviously not happy with this morning’s events. We are trying to find answers and get to the bottom of this." Which was followed by a tweet from TicketLeap: "Hey @Comic_Con, @ticketleap is seeing lots of transactions going through. Keep trying!" Also, #sdcc is a trending topic on Twitter.

Update, 10:20 a.m.: TicketLeap posted about six minutes ago: "There are plenty of #sdcc 4 day passes available. They get held for 15 min and return to inventory if not purchased. Keep trying."

Update, 11:01 a.m.: Hey, my wife made it in:



If you get a similar screen when you try to log in, one that says four-day passes are sold out, Francesco in our comments section has some advice: "Also notice that even when the system says that 4-day passes are gone, that’s just because every single session (even the thousands of failed one) reserve the passes for 15 minutes. After 15 minutes they’re back in the game. So… keep trying."

Update, 2:10 p.m.: Looks like four-day passes are gone.

Update, 6:00 p.m.: Provided the information on the TicketLeap web site is current, it appears all tickets for Comic-Con International 2011 have sold out.