I have a few hats on in the greater FS community which puts me a position where many folks approach me with their licensing issues. One of those hats is the PR representative of the Open Source Experts Group of the Austrian chamber of commerce. In that position I was approached by the APOSDLE project a few months ago, which implemented a learning on the job solution comprising many third party components. Some of these components were licensed under Apache license, others under the GNU GPLv3 but there was one library that was causing licensing issues due to incompatibility. This of course was the MySQL client library.