I'm currently using cssregistration to add css to sharepoint pages. All is working until I need to do an upgrade of the css. The context is:
I used a delegate control in a feature containing the cssregistration component so that I can activate the feature wherever I want.
The problem is when I update my CSS file (located in the LAYOUTS folder) and do an upgrade of the WSP solution, the users don't see the changes. SharePoint is keeping the old version of the CSS (using the old rev number). In fact I need to deactivate/activate the feature to be able to see the changes.
Is it normal? What is exactly the working process of CSSRegistration component?
Thanks for your help.