any word on the game-hacking internet explorer glitch?

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my wife plays some online games especially zuma. she joined one particular website which offers pay for winning a game. the problem is that she made several deposits but everytime she wins, instead of her cash growing, it dwindles. we observed that the website is not true to its claim. then one day, i read a news about a glitch in the Internet Explorer that allowed "hackers" to get into online games (or somewhere in that line). we tried changing our internet browser to Mozilla but couldn't load the game. it said it does not support the game format? how come? is this a scam so that this particular website only operates on IE and not in any other web browser? if not, what ever happened to the IE glitch that MS said they will address?