Update:
DOH! This turns out to be just another urban legend / internet hoax... I was wondering why the URL for a BBC page was on someone else's domain.

http://www.snopes.com/humor/iftrue/lionmidget.asp

I am starting to believe in karma here...

Spectators cheered as entire Cambodian Midget Fighting League squared off against African Lion

Tickets had been sold-out three weeks before the much anticipated fight, which took place in the city of Kâmpóng Chhnãng.

The fight was slated when an angry fan contested Yang Sihamoni, President of the CMFL, claiming that one lion could defeat his entire league of 42 fighters.

Sihamoni takes great pride in the league he helped create, as was conveyed in his recent advertising campaign for the CMFL that stated his midgets will "... take on anything; man, beast, or machine."

This campaign is believed to be what sparked the undisclosed fan to challenge the entire league to fight a lion; a challenge that Sihamoni readily accepted.
...
The fight was called in only 12 minutes, after which 28 fighters were declared dead, while the other 14 suffered severe injuries including broken bones and lost limbs, rendering them unable to fight back

Lion Mutilates 42 Midgets in Cambodian Ring-Fight