Tim Hunt

There is a long-standing issue caused by using case-insenstitive database collations, which I have just written up here: http://docs.moodle.org/dev/Database_collation_issue

There is also a propose solution, which is pretty good, apart from one scary issue, which is also described there.

We now need feedback on this proposal. Does it make sense to you? Should we do this? Can you suggest ways to deal with any of the difficulties?

This is probably MDL-16464

The calls that the STACK question type makes to Maxima can be slow and cause time-outs. It does seem to vary a lot between servers, although for me it was fast on Windows XP, and slow on a Linux system.

The simplest thing you can do to get rid of the time-out errors is to go to the STACK settings page, and increase the time-out time, but that is not really a solution.

The best thing to do is to follow these instructions: https://github.com/maths/moodle-qtype_stack/blob/master/doc/en/CAS/Optimising_Maxima.md (but I am not sure if anyone has tried that on Windows.)

I will have to leave the delimiters question for Chris.