Removing or changing icons...

I have a number of niggling little issues to work out, but all-in-all I am really happy with this module. Thanks so much! And I do agree, it's amazing to me that this is not just part of the Drupal core in the first place--it's so obvious a need for endusers and a clean, simple solution in the UI. You really should give yourself a pat on the back.

So one of my niggling issues is with the icons to the left of each menu item. I would prefer to not have them show at all. Where do I find this snippet of code and how can I remove/comment out this feature? In IE they seem to appear and then disappear between page loads, clicks, and mouseovers, and in all three of IE/Safari/Firefox they float outside the left side of the div. I have attached a screen capture from my Firefox view.

Thanks in advance for any help you can provide.