[benzilla069]

This is completely out of left field with this suggestion, but I had similar problems with the redirection errors like you but I don’t use WPMU so this might not apply.

I honestly can’t remember if I changed any of the chmod settings, I think I might of changed them all the files to 777.

But also in the setup when it asks you in the wordpress integration stage when it asks you to fill in the xxx_xxx_salt settings from the wordpress just leave them blank.

Might help for you.