WinGHCi freezes on startup, never started correctly

[Miaou]

Hi,

I've been installing the HaskellPlatform 8.0.2-a for Windows 64bits on a Win 7 N Pro.
WinGHCi never started correctly. GHCi does start correctly.

I tried to apply the solution suggested in #3, without success, as there is not history to delete.
First installation was into a directory that was not on C:. I tried uninstall/reinstall in the default location without success.
I tried uninstall/install 8.0.1 for Windows 32bits, which lead to the same result.

I have an installation of MinGW of my own (and it's in my %PATH%). Could it interfere?

Thanks,