Firefox vs IE, loop skipping?

A bizarre problem.

I'm making a "memory game" To do so, i loop through 2 rows of 6 columns, loading in images that are acertained from an array.

Eventually this will be randomised but for testing purposes, it loads image 1 in row 1 col 1 etc etc.

The issues is this: Try this link in IE and Firefox. In IE it works perfectly, as it does in the test environment, loading the cards to display 1, 1, 2, 2, 3, 3, etc etc.

In Firefox it skips one, so it is showing only 1, blank, 2, blank, 3, blank etc etc

My object/embed code is perfect in every way.... it does the same this when you taget only the .swf, and I tried the Satay method too. It workls correctly in Netscape 7, Opera 7, IE 6, Mac IE 5.2, Mac Safari.

An error with the Firefox flash player? Help!
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Edit: A quick uninstall/reinstall of the flash player does wonders.... version 7.0.19.0 works perfectly