What are the biggest changes from 1.35 to 2.03 and 2.03 to 2.04?

I read about Window Media player 10 but I noticed something different. I don't know if it's because I installed PIE last night after upgrading to 2.03, but I was able to get on to my banks website (128 bit high encryption).

I had tried to log on my bank's website before and I was not able to with my previous version 1.35.

Any thoughts on the difference in the ROM 2.03 vs 2.04 and possible i.e. secuirty upgrade?