Hi Over here 4.1 is less stable but more fun. My prg actually crashed for no obvious reason for the first time since I use it. (after saving:-) problems are random audio-spikes a bit trouble playing longer files causing dropouts no ability to use vst-instr (prob. my asio driver) no input metering (prob my asio driver too ) ofcourse my asio driver gives no problem with any other audio prg. so the problem will be the communication between lexicon & logic. Also I've got the feeling things I don't know of happen in the background causing little flaws in the performance. (all backgr. exept logic, systray & explorer are shut down as are network & modem) My graph card seems to have no influence All is tweaked with tweakui98 & I made all the adviced settings (vcache, virt.memorie, etc...) Maybe LAWP 4.1.4 (as Mopro, our distributer hinted that both 4.1.2 and 4.1.3 will not be released for windows ) Goodluck and inspiration to all Budy