Forums Bug Reports 6.31 toolbar icon background issue

Yepp, it does - and every time I restart mIRC, the issue is back.

Automated /toolbar commands on my mIRC (I am aware of so far) are adding some extra icons only ...
I'll take up some testing with a fresh mIRC install later this day - to screen out whether/which addons I use might cause this (anyway: addons that worked fine with <= 6.3).

[using XP MCE SP2, classic theme]