I'm using the latest sunab svn.
When rendering a single 3 second MTS clip to avi or .h264 the waiting time, at the start of render, is about 40 seconds and a single core is running at 100%. When rendering starts it takes about a minute to render. This is so much longer than it used to be, especially on a 6 core 3.2 Ghz machine.
This happened once before, but it sort disappeared after a couple of updates.