First step is to get the offending problem(s) into our bug database (bugzilla).
This can be done by any instructor from any problem with these steps:
1. While viewing the problem click the "edit this problem" link.
2. Click right most link in the upper part of the screen: "report problem bug"
3. Fill out bug report of what is wrong with the problem (this can be anything from bad grammar or spelling to mistakes grading an answer).
4. The path to the problem and the seed being used which causes the error are automatically placed in the bug database. If it is a library problem this is all that is needed. If the bug is in a
problem written at your institution you should include the code for the problem in the bug report.
5. If you've already fixed the problem, include the fix in your bug report -- (that's better for everyone).
Fairly quickly these bugs are evaluated and fixed and placed back in the general libraries. You can update the libraries using the CVS update command.
NOTE: The first time you do this you will be asked for your email address in order to register. You will be sent a password via email which you can then change to something you can remember. After that you either login with your email address and password when requested to do so, or if you are always using the same machine, there will be a saved cookie which logs in for you automatically.
If you'd like to volunteer to help fix bugs on a semi-regular basis send me an email (gage at math dot rochester dot edu) :-)