These days we had some trouble with customized search pages. We created some new results pages for the Enterprise Search template, created our solution, deployed the solution on the development machine and everything was fine. Then, we deployed to out test environment, activated the features and… we got errors on our pages that a webpart could not be displayed.
Not funny. Did a refresh on the page and the webpart could be displayed, but another webpart on the same page shows the same error. What the hell is happening here?
OK, I asked my favourite search engine in the internet and it gave me the hint how to solve this problem. This error comes from a timeout of the xslt-execution, but with the proper CU of your SharePoint 2010 environment, this could be solved.
See this blog post for an explanation: http://blogs.msdn.com/b/joerg_sinemus/archive/2012/03/07/xslt-and-timeout-problem-when-transforming-runs-more-than-one-second.aspx?Redirected=true