>> >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
>
>Good idea, but it doesn't help, because the key is not recognized ANYWHERE
>in XEmacs. The idea with the wrong key-binding occured to me already. But
>XEmacs just waits for entering the key to describe and pressing this key
>leads to nothing. It is as if the key would be defect. But in the same
>minute in the xterm beside it the key works quite fine.

have you tried using xev to determine the keysyms involved?  perhaps
one of them got changed to something else?

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