Stefan Monnier wrote:

>>Please apply the following patch to vhdl-mode.el:
> 
> The patch was line-wrapped and failed.  Also please use (unified)
> context diffs when sending patches.  And of course, please include
> a ChangeLog entry along with the patch.  Thank you,

Diff is attached.

ChangeLog is:

2008-04-01  Reto Zimmermann  <reto@gnu.org>

	* progmodes/vhdl-mode.el (vhdl-mode-map-init): Replace
	C-c[a-zA-Z] key bindings.