Hi, I just noticed a weird bug on Mac OS C with LyX 2.02. First I couldn't reproduce it, but now I think I have a recipe, and hopefully someone can confirm it. In some cases, the _sequence_ of Control-x and Control-s that emacs keybindings reserve for saving a document doesn't work. Instead, only the _last_ of the two (Control-s) is apparently captured and leads to the opening of the search dialog because the emacs keybinding for search is Control-s.
You probably don't have to do steps 1) - 4), but I did these steps very recently. 1) Move ~/Library/Application Support/LyX-2.0 to the Desktop. 2) Fresh download of LyX-2.0.2+qt4-cocoa.dmg from www.lyx.org 3) Move old LyX out of Application folder 4) Install downloaded LyX and launch it 5) In Preferences, I then chose the xemacs bind file, and checked the box "Do not swap Apple and Control Keys" 6) Open a new document and type "Hello" or something like that, then save it. To save it with keyboard shortcuts, 7) Open the LyX User's Guide (or another document) from the Help menu (that took me some time to figure out). It opens in a tab. 8) Go back to the first document, make some changes and try to save using the emacs keybinding Control-x Control-s. Now instead of saving, LyX opens the search dialog. This behavior doesn't go away if I close the User' Guide again. I have to restart LyX to recover. This problem _doesn't_ appear when I open two of my own documents, either in separate windows or tabs. It on;y seems to appear when I also open Help documents! Jens