After further investigation I found that Playtech, Net Enter, Cryptologic, and Parlay casinos run flash versions on mozilla browsers without a glitch. I have yet to find a Microgaming casino with a working flash version under mozilla-like browsers.
I also found that under IE the probability of having activex problems is higher on microgaming casinos.
If this is true, the technical issues with flash versions, activex, and browsers are not a general issue but only a microgaming issue.