Default Email application setup broken?

I am running Linux 2.6.37.6-0.9-desktop x86_64 openSUSE 11.4 (x86_64) KDE: 4.7.3 (4.7.3) “release 10”

In System Settings-Workspace Appearance and Behavior-Default Applications - Email Client I have selected Use a different email client and entered thunderbird %u (by browsing to the application using the … option).

When I click an email address, e.g. on a web page that says contact: me@here, kmail2 starts up, not Thunderbird.

I am not a heavy user of this feature, it did work at one time but I can’t say how long ago it broke.

Any ideas or fixes out there?