We had some problems with 4.0.5 where response RTs were all being recorded as ‘000’ - not every time SuperLab ran, just randomly.
So, we have just tried upgrading to 4.0.6 and there seems to be a random delay after responding to stimuli by keypress and the next event/trial being presented. This delay can be several seconds.
I’ve reproduced this with a simple single block, single trial, three event text stimuli experiment that doesn’t save responses. I’ve also reproduced this on three different computers with three different builds, one of which is just a fully patched vanilla Windows XP machine (no AV software or other apps).
We need to either run 4.0.5 with reliable RT recording or 4.0.6 without random delays.