To be honest, I couldn't tell what kind of logo it was. But it was definitely when I struck the ball. Sometimes I see the swing meter bar pointer flash, but that is blue. This was red, and I couldn't read it. Sorry, can't be of more help here. If it happens again, I'll save the Firefox cache and get and offline reader. I will be able to filter it, and check for gif files etc... I just thought there was something built into your software that would put my mind at ease. I spent the next couple of yours ensuring my computer wasn't compromised. It is clean as a whistle.
Note; my cache is automatically cleared when I shut down my browser. Thus, I have to save the cache when the browser window is open.