Hi, here is a Debian bug report (#421189):

From: Andrew Sayers <andrew-reportbug@pileofstuff.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: Remove/merge redundant "dvorak" file
Date: Fri, 27 Apr 2007 01:05:05 +0100

Package: xkb-data
Version: 0.9-4
Severity: normal

I've encountered an obscure bug that occurs in dvorak(gb) but not
gb(dvorak).  When I'm using the Beryl window manager, holding down the
"alt" key causes the active window to lose the focus.  I've tried
several other WMs and can't replicate it outside Beryl.

The "dvorak" file has (largely) compatible equivalents in the respective
national keyboard layouts, so having a specific dvorak file is confusing
to users and leads to inconsistencies like the above - if it's really
important that both exist, could you make dvorak($lang) just include the
settings from $lang(dvorak)?

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.18-4-k7 (SMP w/1 CPU core)
Locale: LANG=en_GB, LC_CTYPE=en_GB (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

-- no debconf information