http://bugs.winehq.org/show_bug.cgi?id=17439
--- Comment #7 from Dmitry Timoshkov dmitry@codeweavers.com 2009-02-25 21:48:06 --- (In reply to comment #6)
Well what I did was open the Open or Save File dialogue window. By default the text box that contains the file to open/save is empty. First single-click any file in the file browser window, this should now make the file name appear in the text box. When you first click the name in the text box it will auto-select all (which you said is a separate issue). Click somewhere in the text box again or press an arrow key to deselect everything. Then, while the text box is still active press ctrl+a and it should reselect all of the text in the box again.
What Windows version is that? As I've said that doesn't work for me in XP and Vista.