Whenever I press shift+2 to get an apostrophe (which LyX normally change to a << or >> sign, things goes wrong.
I get a silly dialog box where the caption says: LyX: Inset::buffer_member... (The rest is cut off) Inside the box, there is the uninformative sentence "LyX Code:2" and an "OK" button. Pressing "ok" just makes this dialog pop up again and again, in an infinite loop. On the command line, I also get: "Warning: Inset::buffer_ member not initialized! "LyX Code: 2" The only solution is to kill LyX. When I restart it, the emergency saved file is loaded and I see that I got my << or >> as I wanted, but this way of writing is cumbersome. Helge Hafting