I'm up!
So my computer is an HP T6400 notebook with 3gb of RAM. I'm not using an interface and this notebook has the IDT HD sound chipset. The drivers are horrid so I'm using ASIO driver instead - which works like a charm.
Bob Bone: If I launch Sonar, and create a new project with the Normal template and drop in an MP3, and click play, Sonar does nothing. The play button activates but gets stuck in the down position for a few seconds but playback does not begin. If I then open another audio project and click play, it plays fine. When I switch back to the NEW project it will now play just fine. This happens with any combination of audio track steps. The only thing that is common is that I must open a second file, play it, then go back to the first file.
Mike Leghorn: Which properties window?
I'm thinking the same thing you guys are. I'm not convinced this is Sonar. It's so flawless, right? :) And certainly there are no roadblocks with what I'm doing: once I open and play a second file, it all works fine after that. It's just...uh... quirky...
I like the plugins thought from John. I'll check the two files to see if there's a weird plugin issue.