Quote Originally Posted by pdcorlis
First - there is a committee set up to hear issues like this, so I'm guessing you're not the first to find yourself at odds with a supervisor.

Second - Remember it's as much about how you say something as what you say. As long as you discuss "your side" of the issue clearly, calmly, and rationally there is little for them to find fault with. You might point out the lack of a dress code regulation regarding kilts.
I agree completely here. Since you've already worn a kilt on at least one occasion then your other supervisors have seen a glimpse of any work related issues. Hopefully some of them will be part of the review committee and you can ask them directly in front of the offended person, "Did my wearing a kilt have any effect on the job I did that day?" Hopefully the answer comes back, No, and you'll get some added support. Stay calm and cool and take your time to think out a well reasoned answer before answering any questions. I also agree with bringing some pictures instead of a live demonstration.

Bring a good attitude and don't let anything get confrontational and you'll do fine.