I've bought Nexus 2 and installed the last update (2.3.2) on my macbook pro (Mac OS X 10.7.2). When I put an instance of the plugin (VST or AU) the result is that :

and after a few seconds Live crash
I've mailed the support of Ableton and reFX (they planned a remote-desktop session tomorrow), but I want know if I am the only one in this annoying case (in fact I don't know if it is a problem of Nexus or Live)
The only potential solution I've thought for now of was to force rescanning of plugins which has not resolve the problem.