Since installing the TP4 I am experiencing various rendering issues which appear unrelated to tgd I am using.
I experience renders that simply stop at some point during the rendering process - no errors, timer stops counting up, it thinks it is rendering i.e. the options are still stop and pause on the render window, but CPU is 0%. I also experience renders that do not start, the timer counts up but nothing happens, this is always resolved by a save and restart and always appears after a number of renders have already been done. Finally I see renders that do not stop! That is it never thinks it has finished despite looking complete. This has the same symptoms as the render that simply stops - so could be special case that it is at the end when it stops.
I was getting the mem errors all the time on TP3 so didn't use it too much, so I don't know if this is new or not. I couldn't see any obviously related posts although this one sounds similar ->
http://forums.planetside.co.uk/index.php?topic=4261.0 but was deemed fixed in TP4