I like your enhanced IDE 1.0.4 but it frequently quits an upload with an error message like "avrdude.exe not in sync." The IDE usually shows the wrong or no com port when this happens. I never had this error on the stock 1.0.4.
I am using ERW 1.0.4 with an Uno rev. 3 on a Win 7 32-bit computer. A friend has the same issue on an XP machine.
Thanks,
Karl