mouse-copy-work-around-drag-bug

mouse-copy-work-around-drag-bug is a compiled Lisp function in `mouse-copy.el'.

(mouse-copy-work-around-drag-bug START-EVENT END-EVENT)

Code to work around a bug in post-19.29 Emacs: it drops mouse-drag events.
The problem occurs under XFree86-3.1.1 (X11R6pl11) but not under X11R5,
and under post-19.29 but not early versions of Emacs.

19.29 and 19.30 seems to drop mouse drag events
sometimes. (Reproducible under XFree86-3.1.1 (X11R6pl11) and
XFree86-3.1.2 under Linux 1.2.x. Doesn't occur under X11R5 and SunOS
4.1.1.)

To see if you have the problem:
Disable this routine (with (setq mouse-copy-have-drag-bug nil)).
Click and drag for a while.
If highlighting stops tracking, you have the bug.
If you have the bug (or the real fix :-), please let me know.