OK here is what I see on my phone after flashed the latest March 07 Rom.
1) The booting time is quite long/much longer then any previous Rom. Not a big deal to me.
2) The Activesync is an issue. it take over 10 minutes to complete the sync, often error out. May be My PC has too much of crab on it or virus and spyware and anything else you may think off hehehe.
3) The most deadly scary issue is phone turn itself off on it own. I can not turn it back on with the button on the top or the power button. only one way is to remove the batter and put it back on then turn it on. after turn it on for a min or 2 then it shut itself off again.
Anyone see these 3 issues? I don't care about the first issue, the second issue bother me a little. the 3rd one, scared the heck out of me