This is 100% reproducable: 1) Go to "Change Columns" menu and add the "project" column. 2) Go to Bug Query form, clear all fields and put "Modified in 5 days". 3) Press "Submit". Your browser would send the query to the server and nnever get anything back. BTW, for some queries I get the header and only after that the connection freezes. And some queries work fine, but each particular query works in the same way all the time.
Forgot to mention - I used to have "project" column in my cookies file and I never noticed this problem until yesterday (Tue, Dec 22).
I was unable to reproduce, but in talking with Terry, discovered that project was a leftover from bugsplat, and isn't needed or used, so it's gone.