It would be fantastic if MUSHClient offered an option of frames so specific kinds of text can be directed into certain frames and away from other ones.
And, soon (well, soon as in... its being developed currently), we'll have other options, since Nick is (last we heard) developing some more friendly notepad window type things.
Ah yes, especially branches. I was going to tell you to use it if you weren't, mainly because a release with that LoadPlugin bugfix would be nice :P Have you been developing the windows system on a separate branch? Maybe you could release the main bugfixed branch as 3.50.1 or something?
Actually making branches is really easy, and as (I think) the bugfix for that particular bug was small, you could just commit your version, retrieve the older one, fix and release that, and go back to working on your current update. What would we do without CVS... Perhaps it wouldn't even be necessary to change version numbers, since if anyone had a problem with it, I guess they read this already. It could be "officially" fixed in the next release.