I'm having some problems with blur in my build of inkscape. The 'about' screen identifies the build as inkscape 0.45+devel built 5 jan 2008.
My blur effect looks terrible (my preferences are set to 'best' in the filters section) and so do my exports to png with blur.
Here's an exmaple:

Is it something I'm doing wrong?
Also, is there a way to keep to the latest bleeding edge build easily using ubuntu's apt-get system? I think I installed my version though aptitude after using this guy's repository http://my.opera.com/area42/blog/inkscape-0-46-prerelease. Is there a better one that I can't find? (I don't want to compile myself!)
Thanks