I am having a very strange issue with Magento.
I skinned the install for a client, and everything has been working fine. I used a pre-built theme for this skin, and made some minor changes - but none at all to the system, or core files of Magento.
The issue I am facing is that anything I go to www.siteexample.com/shop/category/view/id/9 for example, or it's Rewrite URL of www.siteexample.com/shirts.html - it redirects to the homepage, or gives me a 404.
Going directly to a product for example, works just fine.
Has anyone ever faced a similar issue? There is not much else I can offer. If there is a log that I can check to provide more info, please let me know and I will provide it.
Thanks in advance. Really puzzling.