EQ2Interface - Odd highlighting on the hotbars.

First off I have to say that I'm a new convert to this UI. Previously I was using ThorUI. Hat's off to the creator as this entire UI is pretty much a work of art!

One small thing though (isn't there always). I'm noticing that sometimes when I cast spells or use CA's, even via Alt<#>, Ctrl<#>, etc. instead of clicking with a mouse, the spell icon becomes highlighted and stays that way. Occationally I've had as many as 5 highlighted icons up at once. They don't see to go away until I mouse over them. After that they return to their normal non-highlighted selves.

Is anyone else experiencing this issue? And if so, can it be fixed? I realized it's just a visual bug, but sometimes on quick glance it confuses me into thinking I'm casting something I shouldn't be.