Hi, I think my naming conventions might be causing some confusion. I created a prefix called WinXP using WineBottler. It's not a copy of a Windows installation. I installed WinMerge within Wine, not by copying the binaries from a Windows box. I'll try it again without the open -a, but I've tried it using many different permutations already and I don't recall that causing a difference in what I was seeing. WinMerge starts fine, I just can't get the command line arguments to pass to the Windows exe
