SP2010 Branding Tip #8 – Alternate CSS can crash your site (until its fixed) 2

This is really less of a tip and more of a temporary gotcha that exists in most of the builds I have tried for SharePoint 2010. As I understand it, this problem won’t be fixed until AFTER the public beta that is scheduled to be released very very soon. When setting the Alternate CSS for your site, be very careful when using the Browse option: When you use this to select an Alternate CSS the setting will use a full URL like this: http://portal.contoso.com/Style Library/CustomStyle.css Unfortunately having the full URL really freaks out SharePoint 2010 (until they fix this) and it tries to use a malformed URL, which in turn breaks your site completely. This is the error that it will return: Cannot make a cache safe URL for “1033/styles/http://portal.contoso.com/Style Library/CustomStyle.css”, file not found. Please verify that the file exists under the layouts directory. As far as I can tell, if you do this to ...