Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Unlisted Binary Package

Steps to Reproduce:
Pull up the accounts list on the bottom of the Kopete contacts window, right-click on a WLM account, and attempt to change your Nick.
Expected Outcome:
Nick will be changed permanently, until such a time as you change it again.
Actual Outcome:
Nick does not change at all, as evidenced by lack of notification in chat windows, and checking your Nick in the same way that you set it.

Other Notes:
I only noticed this recently - possibly since the RC, but I'm not sure, as I wasn't aware of it for some time after the release of 4.2.0.  Also, I've noticed that when I use another client, such as Pidgin, or the official MS WLM client, my Nick in that client is set to whatever it last was /in that client/, even across machines.  However, when this bug first appeared, I noticed it because my Nick had reverted to one that I had used some time ago on a different computer/OS/client, and never in Kopete...  That may be a separate issue, but I thought it was worth mentioning, in the context of this bug.