I’ve been playing with 4.0.6 on my 17" 1GHz Powerbook (I notice that the voice key now claims to take subject responses from the SV1 accessory connector–I’ll be using that feature substantially, thank you). There are problems with crashing that I’ve seen in three places. First, with a completely blank, new experiment, select new block, and then click on the “+” sign to create a new conditional expression. The expression editor comes up, with the mysterious string “qqweqwe” in the “Subset:” window, and the beachball starts spinning; within a minute or so, Superlab crashes.
It is very similar with a new trial: on a new, blank experiment, select new trial, and then click on the + sign to create a new condition: beachball, eventual crash.
Also, on this machine, SL seems to be very uncomfortable with image stimulus lists that contain the same image path more than once. It detects this and issues a warning, but it lets you add it if you want. But later on, if you try to use it in an event, or if you try to edit it later, SL will crash. There appear to be some things you can do with this kind of list, but sooner or later, it will crash SL. Also, when there is a list with a single item repeated more than once, the earlier instances of the file path show up as blank lines in the Stim list editor.
As a comparison, I also tried the same three things on a Macbook Pro running Tiger, and everything worked fine. Unfortunately, that doesn’t distinguish between the processor type and the operating system level.