Invalid argument error in minified version

I get an Invalid argument error in IE8 on Win 7 on 

k.vmlSheet.addRule(d[e],"behavior:url(#default#VML); position:absolute;")

when using the minified version, heartcode-canvasloader-min.js. No error when using the normal version, heartcode-canvasloader.js.

Files downloaded 2013-09-27
