Thanks for the answers, sorry for reporting the bug but I received the answers very late (2 hours ago):
Well, I will try to elaborate a bit.
About the shortcuts / accelerators:
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This occurs with both the shortcuts and the accelerators.
About the localization:
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This occurs on both the translated and untranslated version (LC_ALL=C to be sure, I have tested before asking).
About the changes in debian:
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Well... everything is moving in sid... :)
gtk / gtk3 / wx ....
Previous version:
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The latest version for the wx stuff is 3.0.3.1+dfsg2-1
The only other version available was 3.0.2, I've not found anything else on debian repositories. Even then, all the .deb are not available for this version.
So I've rebuilt the whole wx stuff from source, and installed them:
../libwxbase3.0-0v5_3.0.2+dfsg-4_amd64.deb
../libwxbase3.0-0v5-dbg_3.0.2+dfsg-4_amd64.deb
../libwxbase3.0-dev_3.0.2+dfsg-4_amd64.deb
../libwxgtk3.0-0v5_3.0.2+dfsg-4_amd64.deb
../libwxgtk3.0-0v5-dbg_3.0.2+dfsg-4_amd64.deb
../libwxgtk3.0-dev_3.0.2+dfsg-4_amd64.deb
../libwxgtk-media3.0-0v5_3.0.2+dfsg-4_amd64.deb
../libwxgtk-media3.0-0v5-dbg_3.0.2+dfsg-4_amd64.deb
../libwxgtk-media3.0-dev_3.0.2+dfsg-4_amd64.deb
../libwxgtk-webview3.0-0v5_3.0.2+dfsg-4_amd64.deb
../libwxgtk-webview3.0-0v5-dbg_3.0.2+dfsg-4_amd64.deb
../libwxgtk-webview3.0-dev_3.0.2+dfsg-4_amd64.deb
../wx3.0-doc_3.0.2+dfsg-4_all.deb
../wx3.0-examples_3.0.2+dfsg-4_all.deb
../wx3.0-headers_3.0.2+dfsg-4_amd64.deb
../wx3.0-i18n_3.0.2+dfsg-4_all.deb
../wx-common_3.0.2+dfsg-4_amd64.deb
../wx-common-dbgsym_3.0.2+dfsg-4_amd64.deb
I then rebuilt hugin (otherwise it doesnt work). And still have the problem.
Other sofware using the same libwx dependancies: audacity:
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I remarked audacity has the same dependancies (libwxbase ans libwxgtk3).
Audacity, built with the same versions of these libs had both the accels and shotcuts working.
(I have no idea of what are the internals of audacity though).
Regards
Jean-Luc