If you tried Eclipse Juno, you may see strange behaviour with open tabs in editors. Juno has stopped retaining open file tabs tabs. If you open new file using
Ctrl Shift R, it closes last active file . This behaviour is started in Juno.
If you take a look in the preferences, in the appearance section, you won’t find anything related to this.
The good news is that I found fix, rather work around :). Go to Preferences -> General -> Appearance and switch to the Classic theme. Yes, switching theme solved this issue.
I am still looking for correct fix, let me know if you find one.