Version:            (using KDE 4.0.83)
Installed from:    Compiled From Sources

... which results in the following output with 'branch 4.1':

Building kdebase (6/14)
        Waiting for source code update.
        Source update complete for kdebase: 1192 files affected.
        Compiling, attempt 1...
svn: URL 'svn://anonsvn.kde.org/home/kde/branches/kdeplasma-addons/4.1/kdeplasma-addons' doesn't exist
Error updating kdeplasma-addons, removing from list of packages to build.
svn: Can't read from connection: Connection reset by peer
        Build succeeded after 6 minutes, and 11 seconds.
        Installing kdebase.
        Overall time for kdebase was 15 minutes, and 2 seconds.

Building kdeplasma-addons (7/14)
        Waiting for source code update.
        Unable to update kdeplasma-addons, build canceled.


The obvious patch:

--- 4/bin/kdesvn-build  2008-07-07 17:04:15.000000000 +0200
+++ kdesvn-build        2008-07-13 17:00:55.000000000 +0200
@@ -942,7 +942,7 @@
     # like typing them all in. kdevelop and konstruct are special cases.
     my @kde_module_list = ((map {'kde' . $_} qw/accessibility
             addons admin artwork base bindings edu games graphics libs
-            multimedia network pim pimlibs plasmoids sdk toys utils webdev/), 'kdevelop',
+            multimedia network pim pimlibs plasma-addons sdk toys utils webdev/), 'kdevelop',
             'konstruct', 'kdevplatform');

     # If the user already has the module in the form KDE/foo, it's already