update: hey James, Peter and Everyone else... so over the weekend i ended up installing fedora 13 from scratch, used my regular kickstart, and some custom rpms + all of my usual configurations. i then installed wine 1.2 + wineasio after this i upgraded wine through "testing" and got wine 1.2-2 My system is pretty much the exact same, except my VSTi's are working again with almost no xruns! :) im not sure what the difference is now, other than grabbing the testing repo version of wine(and i can't imagine too much has changed in that). But i am happy, as things seem to be on "the up and up" again. The only xruns i get is from Native Instruments Battery3, when highlighting the drum cells or loading new kits. Massive and FM8 are functioning normally now. So everything is back to normal and working - phew.... maybe something was messy in the registry or possibly some other oddity. I haven't been able to figure out what exactly, But it's definetly NOT a regression in Wine. i am quite happy to report! I just thought i should post an update. oh and Peter I looked up jackwasio, but there is no source code around. seems to be OSX .pkg only. I was going to check it out. i read that the code had been revised a bit, something about semiphores being removed to work nicer with Jack. I also read it had been tested with Slakcware, but again i couldn't find packages(rpm) or sources(gzip). If you got a link, i would be interested. google didn't turn up a whole lot. thanks again