My problem seems simple, but I actually spent 4 hours looking for the problem and can't find it.
I have a plug-in in magento to show a banner slider in my frontend page together with an image below the banner. My issue here is that, the image below the banner do not have hyper-links and still when you put the mouse over the image, an 1px grey border appears around it and it receives opacity.
I went throw every css file I found in my magento folder and could not find the source. The website is here
Is it possible to use the !important feature of css to solve the issue here?