I tried to work with several Linux native VST instruments plugins but, each time, I had the same problem: the interface does not display properly. An example of what I mean:
No text, as you can see. I tried the following: tonescape (http://www.mucoder.net/en/tonespace/) and every TAL plugins (http://sourceforge.net/projects/distrho/files/Ports/TAL-Plugins/).
I'm using Ubuntu 11.10 with Unity 2D.