To reproduce this:
- click on the search box in fogbugz but do not enter any text
- hit enter or click on the search icon
- A new search box should be displayed in the main pane with the text "Please enter a search term."
- Search for a valid case ID
This gives very different results than a search from the normal search field in the upper right. For valid case numbers, I get anything from a list of results to "Nothing was found that matched."