It looks like it might be a problem with english.lang, and it just happens to show up in the alarm menu.
Start completely from scratch:
svn up
cd build
make reconf
make clean
make
A change in a language file can sometimes compile funky, but make clean should take care of it. If you've applied any patch that affects a language file, it might fail again. If all this fails, check out a completely new working copy to another directory and build from that.