From the Debian bug report:
On Thu, Jan 28, 2010 at 06:37:40AM -0800, Brian Marshall wrote:
> $ GTK_IM_MODULE=xim epiphany
> Typing "debian" in any form field produces "ddeebbiiaann".
> $ GTK_IM_MODULE= epiphany
> Normal behavior. Typing "debian" in any form field produces "debian".
> The same thing happens with Midori, but not Arora (which uses Qt). This
> only affects forms in web pages, not the browser UI (e.g., the location
I can confirm this behaviour, though it doesn't happen with plain scim
(GTK_IM_MODULE=scim). It also leads to strange behaviour when using
advanced input methods in scim, such as anthy.
*** This bug has been marked as a duplicate of bug 32290 ***