I'm now on a different computer, and because of spaces in the temporary directory path, reverse search completely fails for both lyxeditor.bat and the aforementioned viewer command. The LyX status bar reads: File does not exist: C:\Documents Even when I add quotes, it says File does not exist: "C:\Documents Apparently we're not parsing the quotes correctly?
Further bizarre behavior: whenever I specify an explicit viewer (both pdf/dvi and both with/without arguments), that viewer starts minimized. But not when the viewer is "auto". This goes back at least to 1.5.5. Is this a bug? -Ben