Catch my Point

SharePoint Crawler converts links to lower cases before indexing, this is OK if you are not indexing Complex URLs. But this could be a problem if you index pages with query string parameters and if parameters are case sensitive.

Example:if you have a Content Query Webpart (http://www.andrewconnell.com/blog/archive/2008/02/18/Subclassing-the-Content-Query-Web-Part-Adding-Dynamic-Filtering.aspx)  or Data view webpart with filters (passed by Querystring).

In above example "Division" is case sensitive, SharePoint Crawler will not be able to index this webpage as CQWP will throw exception when it access same page with http://liware/sites/publishing/widgets/pages/default.aspx?filter1field=division&filter1value=europe url.

The above image is from Andrew Connell Blog (http://www.andrewconnell.com/blog/archive/2008/02/18/Subclassing-the-Content-Query-Web-Part-Adding-Dynamic-Filtering.aspx)