I've just installed new Fedora 15 Beta and I'm facing a problem which I haven't faced in Alpha version. I'm not sure if I would be able to describe the problem, so I will use screenshots.
This is an example menu bar taken from Firefox:

As you can see, I can use <Alt> + <Z> to get to Zakladki menu (it's Bookmarks in English). However, in Poland we use <Alt> + <Z> to get special polish letter ż (same goes with <Alt> + {<E>, <N>, <c>}). The problem is: Fedora seems to take right <Alt> key as a shortcut key, so when I use <Alt> + <Z>, Bookmarks menu opens up. Of course I do not want it to open, I want to use my Right Alt for polish letters.
I use IBus input system, polish keyboard layout and I didn't experience any problems like this on Fedora 15 Alpha. I have no idea if does this matter, but I use wireless keyboard - Microsoft Bluetoth Keyboard 6000.