when working with starkit under Linux, I found that German umlauts (���) do
not appear in text window when the appropriate key is pressed.
The binding is identical to wish, the event fires when the key is pressed, but
the pattern %A does not expand the key to it's ASCII value.
In the documentation of Tcl, I read that for the expansion to ASCII value XLookupString
is responsible. I did not check it out because I don't 'speak' C.
Actual workaround: set bindings explicitly with <Key-adiaeresis>.

There are two versions of Tclkit for Linux. The dynamic one should be able
to perform all locale actions, input translations, etc.
The static build of tclkit is not always able to do this - this is a limitation
of glibc, which does not encourage fully static builds. They exist nevertheless,
because a fully static build has no system compatibility issues.
Conclusion: make sure to use the dynamic version of tclkit for Linux.
(Please also check 8.4.5/8.4.6 - they may have improved a bit in this area)