Window methods works only with POST method

Today I try to resize my browser window and position it and the following exceptions were thrown:

    The http request method called for /position is GET but it has to be POST if you want to pass the JSON parameters {"x":0,"y":0}

     The http request method called for /size is GET but it has to be POST if you want to pass the JSON parameters {"width":1280,"height":1024}

I removed the possibility to use GET in this methods. I use the Selenium 2 RC (2.32.0) and Firefox 20.