According to Bjoern Labitzke:
>
>My problem: [ and { can't be entered in XEmacs. The key is just ignored:
>No error message, no wrong characters; just nothing! But the same key
>works perfectly okay in xterms.
>

Try using "M-x describe-key" and then pressing the key you are having
problems with - perhaps there is some bizarre keybinding stuffing you
up?  Also, is it a problem in all modes?  It may be a mode specific
key binding.

-- 
Brett Lymn, Computer Systems Administrator, British Aerospace Australia
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  What do you get when you cross a cantaloup with a dog?        Melancholy :-P