<p>I am trying to open a report in Crystal Report 11 Designer (product version 11.5.8.826), but it seems to freeze up. This report use to work fine, but today the client could not load the report.</p>

<p>I also tried to open the report on another developer's workstation, with the same result.</p>

<p>Has this happened to anyone else?</p>

Are you sure all servers referenced in the report are still online? If you've changed database connections on the report, I've seen Crystal store a reference to the old one even when there are no active usages. If the old server is offline, Crystal still tries to connect to it when loading and will hang for a long time. We had a report that used to load in seconds start taking minutes right after an old test server was powered down. Powered it back up, it loaded instantly again, even though all the connections to it were seeming removed. We wound up totally rebuilding the report from scratch.
I found it using Sysinternals TDIMon, it showed connection attempts and timeouts coming from Crystal.