Qt in PATH & strange qmake location path

This bug is originally described in Qt Developer Network but here is copy-paste from there:
""
If I said quickly the exact problem:
Inside Qt Creator -> Tools -> Options -> Qt4 -> Qt Versions -> Auto-detected/Qt in PATH.

I have in here strange path for 'qmake Location' -> c:\qt\2010.05\qt\bin
qmake.exe.
Note: as you can see there is two backslaches and I don't known why. I can't remove that definition because these lines were colored with grey (i.e. can't edit).
""
Link to the problem (if needed): http://developer.qt.nokia.com/forums/viewthread/1542

SOLUTION?
I have got good advice to make my environment settings the last backslash of PATH value.

• I had the following definition in my environment settings: C:\Qt\2010.05\qt\bin\
• And when I have removed the last backslash: C:\Qt\2010.05\qt\bin

Auto-detected/Qt in PATH was shown right -> c:\qt\2010.05\qt\bin\qmake.exe

So that additional backslash was the problem in my case.