When reporting a bug please advise the version number of MUSHclient that you are using (see Help menu -> About MUSHclient).
Also please check the release notes for recent versions if you are not using the latest version. Sometimes new versions are released that are not yet listed in the main Downloads page (while they are being fully tested).
The most recently-released versions will be listed at the News and updates forum page.
If the bug relates to a trigger, alias or timer please include a copy of the item that causes the problem. See http://mushclient.com/copying for how to do that.
If you have got an error message, please include a copy of that message (copy and paste).
Posts like "I made a trigger, and got an error", are incredibly unhelpful, as they convey no information about what you did, and what, exactly, went wrong.
Checklist - please include:
Version number of MUSHclient
Copy of the thing that caused the problem
Copy of the error message that resulted (or the screen output)