Tiling problem seems to be a little random, I'll scratch my head a bit over it.
New one now - I MISTAKENLY downloaded and installed the latest MS patch for OE/IE and hey presto, I have the shortcut 'arrows' back again. (See previous thread a while back)
This time, not only will Tweakui (98) not solve it but when I look in the Reg. for the 'IsShortcut' key referred to in the previous thread, it isn't there!
H.E.L.P......!