Hi, upstream OpenSlide maintainer here. The patch Mathieu mentioned is only needed for libjpeg-turbo == 1.2.0, so it shouldn't be necessary unless there is a desire to support building the source package on Ubuntu 12.04. Otherwise, I would expect the OpenSlide 3.4.1 update to be a simple version bump, plus maybe switching the libopenjpeg dependency to libopenjp2.
More generally, I'd very much like to see OpenSlide continue to be packaged in Debian and its downstreams. OpenSlide has infrequent releases, and I try to be a well-behaved upstream, so I hope maintenance of the package wouldn't be a significant burden. If there's anything I can do to help, please let me know.
