lower case letters

I'm not sure this is a client problem but it appears with MUSHclient 3.59 (haven't tested 3.60) only.

We have tested it with zmud, gmud, a Java client and plain telnet all of which don't show this problem.

In the following two lines the "under" is upper case in all other clients. I have no idea why it would be lower case in MUSHclient.

You start to swim.
under the Circle Sea

.. which is ..

You start to swim.
Under the Circle Sea

in all others.

Is it still like that if you disable triggers?

You need to establish what is actually arriving. When you are about to see that line turn on Debug Packets under the Edit menu (and turn it off again afterwards).

If you see the "Under" in upper-case there, then there is some sort of problem. However with the recent addition of the plugins that can change incoming packets I would be checking you don't have one of those installed.

You might also check and see if your mud hasnt (for whatever reason) given a seperate response on a per-client basis. Try changing "Mushclient" to... telnet, or whatever else (Game > Configure > Output: Telnet Terminal Type).

I know servers can react to different clients, as to whether yours does (or this is a side effect of that), would require some more information. But it could possibly be that.