I have researched this issue to death and have been unable to come up with a solution. For some reason Magento is appending
to the end of my URLs in some cases. What makes this issue worse is the canonical meta tag is also showing this as the preferred URL and so far I have been unable to stop this. Has anyone else run into this issue and have you been able to solve it?
Example from the view source:
<link rel="canonical" href="http://www.my-site.com/my-product-product.html?___SID=U" />
Another strange occurrence is the fact that it shows live in URL sometimes on categories but not always, and yet it does always show correctly for categories in the canonical meta tag.