Hi Joaquim,
welcome to Disko. I hope you like it a lot.
@1) I can certainly add the changes to compile with gcc 4.4.x.
@2) we experienced some problems in the past between the single releases of swfdec with the api, so we decided to stick with this single version.
I added support to swfdec-09 to the SCons build system in the git. Please give it a try and please tell us your results.
@3) You can change the diskorc.xml to use the X11 xshm interface, just edit the file and change the parameter outputtype from xvshm to xshm.
How to configure your X11 strongly depends on your graphics card setup. I bet you are using an ATI
kind regads
Stefan