I have installed MS Office 2010 with wine 1.7.4. All works fine, but when I open a document from Word, Porwerpoint, Excel,... it isn't possible to change the size of the window. Also the reduce/restore-button doesn't work. I can completly minimize or maximize the window to fullscreen but I can't make it smaller to have two windows open. I work on Ubuntu 13.04 and with PlayOnLinux 4.2.1.
Are you using the "virtual desktop" setting in Wine Configuration? I know its a desktop on a desktop, but is very useful for managing windows. I use it for fullscreen applications that resize my desktop.