Yes. 16 bit 44.1K wav files
It's XP.
A little research seems to indicate that it is indeed a media player issue. Wav files with any type of summary information attached to them seem to confuzzle the burner.
I found this in another forum, and although I'm using Cubase instead of SoundForge, I'm going to go out on a limb here and assume that Cubase is also attaching summary info to the wav files, since this is the exact same issue I'm having.
"Windows Media Player doesn't handle summary information in wav files.
If you open a wav file in SoundForge and then go to File/Save As..., you'll notice there's a button for summary info, and a checkbox that says to Save Summary Information With file (or something similar). That information, if it is saved, is read by Media Player as a click, which you get to hear at the end of most or all CD tracks. If you just uncheck the box and re-save the wav file, the click goes away magically.
It's stupidity on the part of Media Player, but that's okay-- it's not intended as the end-all CD burning program. But this solution did work for me and makes Feurio unnecessary (in my situation)."
The burner apparently reads the summary file information as some type of audio data, and the corresponding result is the pop I'm getting between tracks.
I'll be getting myself a new burner.
Thanks for the help!