Today last D-U cli
http://pastebin.com/6Q7z0HWP (http://pastebin.com/6Q7z0HWP)
Be carefull!!! READ BEFORE ANSWER!!!
ok - but kernel headers are not the kernel - so one might encounter problems compiling prop. video-drivers, but thats it.
This happens frequently if you have multiarch enabled because the necessary i386 package sometimes lags a bit behind depending on build issues, what mirrors you're using, etc.
http://forum.siduction.org/index.php?topic=3967.0
http://forum.siduction.org/index.php?topic=3986.0
So yes, the best thing to do is post and warn other users, but don't get too panicked about it unless it doesn't resolve in a day or two.