A lot of MUDs use the @ symbol for in-mud color codes. This causes problems when adding the IMC patch, because names of people don't display correctly. The solution is either to convert the @ to an @@, or change the MUDs color code.
There appear to be several way of handling this, but this seems to be the simplest I've found.
In the imc/imc.color file, just add this entry:
#COLOR Name MUDCol Mudtag @@ IMCtag @ End
With minimal testing so far, this appears to work fine. Can anyone forsee any problems with this method that I haven't considered? I'm still new to the IMC code, and haven't yet explored it fully.