_Steinberg's Cubase is my DAW of choice and has been for some years now. It's a big and powerful product and it has to be said that it has its share of issues.  Many issues are environmental; they are casused by factors outside of Cubase itself, but when you have a problem, well, you hae a problem irrespective of what causes it.  Over the years I have kept a notebook of Cubase fixes and I am now going to use this page to keep track.  There are many resources out there for Cubase - visit the forums at www.steinberg .net/forum for much discussion but be warned, it can get a bit whiney over there at times.