Did anybody else at the Springsteen concert at the UC last night hear incessant feedback?

At what was otherwise a great show, I was continually bothered by the sound of feedback. The people I was with only heard it on-and-off (albeit through the whole show), mostly when they played louder/harder. I, however, heard it the entire time and it nearly killed the experience for me. I think my hearing is otherwise normal-- am I going crazy? I have checked news reports, Twitter, etc. to see if there was any mention of feedback issues at all, and nothing has come up. Did anyone else have any issues with hearing a high-pitched, whistling/screeching "feedback" noise throughout the show???