[ubuntu 11.04] weird graphic glitches / compilation problem ?

Hi,

Like the title says, I have strange graphic glitches with my own builds on ubuntu 11.04, like this :
http://pix.toile-libre.org/upload/img/1308243881.jpg

However, the builds downloaded from graphicall work fine.
What could be the problem with my builds ? Some bogus libraries ?

Technical details : ubuntu 11.04 / nvidia driver 270.41.19

Python drives all the menus so it probably has to do with that.

Did you get these dependencies? (as listed on http://wiki.blender.org/index.php/Dev:2.5/Doc/Building_Blender/Linux/Ubuntu/Scons )

sudo apt-get install subversion build-essential gettext \
 libxi-dev libsndfile1-dev \
 libpng12-dev libfftw3-dev \
 libopenexr-dev libopenjpeg-dev \
 libopenal-dev libalut-dev libvorbis-dev \
 libglu1-mesa-dev libsdl1.2-dev libfreetype6-dev \
 libtiff4-dev libsamplerate0-dev libavdevice-dev \
 libavformat-dev libavutil-dev libavcodec-dev libjack-dev \
 libswscale-dev libx264-dev libmp3lame-dev python3.2-dev