I have this same problem. Would really like to use this useless key (there are no CD-ROM drives anymore) for something else--like mapping it to "Delete" because I keep hitting it instead of Delete.
Hi, thanks for creating this bug report in the first place @zedauj, I was very surprised my Eject key mappings weren't working.
Any news on this @Andreas_Hegenberg? I just got a brand new full numpad Mac keyboard and it would be lovely if we could use this well positioned key that's now obsolete.