Hi,
Just to check whether this apparent bug has been reported for LyX 2.0. I have experienced several times erratic changes in the position of the cursor in relation to the displayed lines of text. At some point when the cursor is positioned in the lower parts of the displayed lines of text, a sudden scroll occurs and the displayed lines of text changes by moving the line of current cursor position into the place of the firsted displayed line of text on screen. Cheers, Sam