The search string you typed is not valid.
I noticed some odd behaviour with the search recently. Any time you first search for a string containing a stop word, it doesn't return any result and instead displays the error message "The search string you typed is not valid."

If I then refresh the page or hit Enter again, the search results come up as expected.
I've tried creating a new project with only 2 topics and the same thing happens there. Even removing the stop words from the "Stop Words" list doesn't seem to do anything.
Any suggestions?
Thanks,
Simon
