Was this caused by the lab or my camera?

On a roll I recently had processed, most of the photos had strange
transparent red shadows on them. Some covered the entire picture, some
only portions. On many of them there is a line of red TV-shaped
shadows, apparently in the pattern of the sproket holes of the
negatives. These distortions are clearly visible on the negatives, so
I know it wasn't a problem with the print. Did the processor screw up
the negative somehow, or was it a problem with the camera (perhaps
light seeping in)? This only occured on one roll . . . those I took
before and after it were fine.

In article <d179b616.0407031757.52d3f12f.DeleteThis@posting.google.com>,
PAKcyclist.DeleteThis@webtv.net (Paul Kossa) wrote:

 > On a roll I recently had processed, most of the photos had strange
 > transparent red shadows on them. Some covered the entire picture, some
 > only portions. On many of them there is a line of red TV-shaped
 > shadows, apparently in the pattern of the sproket holes of the
 > negatives. These distortions are clearly visible on the negatives, so
 > I know it wasn't a problem with the print. Did the processor screw up
 > the negative somehow, or was it a problem with the camera (perhaps
 > light seeping in)? This only occured on one roll . . . those I took
 > before and after it were fine.

Surely sounds like a light strike, better known a fogged film.
Did you open the camera with film unwound?<!-- ~MESSAGE_AFTER~ -->