The list is mostly the same as it was under 2.1.1…
One plugin is now working correctly in 2.1.2 while it wasn’t in 2.1.1. That’s UpStereo.
One plugin (GonioMeter) isn’ working anymore. Now it crashes, under 2.1.1 it seemed to work, but it didn’t really work.
One plugin that was working, shows bugs in a more in-depth test.
And that’s on a total of around 65 recent, known good free plugins gathered for testing.
That’s not to say VST support is perfect. There’s the one bug with the closing button on OSX that lands you with a forced quit as only way out.
And there’s still some inconsistent behaviour and oddities, but these have been around for a very long time. And nobody ever stated that VST support was full, fully matured, or complete.
These plugins will also be tested in several other DAW’s. I expect these will show some unwanted behaviour too. I’m just curious as to which tool shows the better support…
There is also this specific issue http://bugzilla.audacityteam.org/show_bug.cgi?id=1329. ENTER does not work to apply effects but does work if you switch out of and back into Audacity. But if you switch back into a real-time preview effect then ENTER to apply the effect, all RTP effects are greyed out in the menus for the session (though appearing enabled in Plug-in Manager).