I notice a problem with the integrated MP3. It seem to me that when I create an MP3 directly with SONAR, it always appears to Media Player as if the recording is about 4 times longer than it is. In other words, if the song is actually 3:30, Media Player may say it is 14 minutes long. it plays correctly, but the progress bar is misleading in that case.
If I generate to WAV, then convert to MP3 using Winlame, everything comes out correctly. This is surprising because I believe it is LAME 3.97 in either case.