How to prevent Remmina to scale RDP window?

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http://askubuntu.com – I have been using Remmina since 11.10 and it worked fine in 11.10. Suddenly, in 12.04, when I connect to a Windows machine and connection specifies custom resolution that is smaller that my monitor's resolution, the RDP window starts scaled with uneven proportions. And there is no way to scale the window 100%. Default view mode is set to "Automatic". RDP resolution is set to 1027x768 while my two monitors are 1680x1050 each. Using Nuveau driver for Nvidia NVS 295. (HowTos)