Sometimes Flash Player with debugger is no displaying all correctly. I have an application which displays more than 200 bitmaps on the stage. Because of the Flash Player with debugger helping my Flex Builder 3 installation to work/debug properly the application always loaded correctly those bitmaps, but after been reported by several places that the bitmaps were not loading at all I faced the two-day sprint of finding the issue.

Finally I noticed that the issue does not exists for machines with installed Flash Player with debugger. After uninstalling the software from my machine I start having the problem there.

That case showed us that the ‘debugger’ version was ‘suppressing’ the problems sometimes. In our case it was an incorrect class instance.