dapper to edgy fails due to x11-common

[Nikolaus Rath]

Binary package hint: update-manager

The update failed when apt-tried to install x11-common:

 │ Cannot remove /usr/X11R6/bin directory │
 │ │
 │ This upgrade requires that the /usr/X11R6/bin directory be removed and replaced with │
 │ a symlink. An attempt was made to do so, but it failed, most likely because the │
 │ directory is not yet empty. You must move the files that are currently in the │
 │ directory out of the way so that the installation can complete. If you like, you may │
 │ move them back after the symlink is in place. │
 │ │
 │ This package installation will now fail and exit so that you can do this. Please │
 │ re-run your upgrade procedure after you have cleaned out the directory. │
 │ │

The files in /usr/X11R6/bin are

[0] nokile:/usr/X11R6/bin# dir
total 220K
drwxr-xr-x 2 root root 42 Feb 4 23:29 .
drwxr-xr-x 4 root root 26 Feb 4 23:29 ..
lrwxrwxrwx 1 root root 17 Dec 21 2005 xkbcomp -> ../../bin/xkbcomp
-rwxr-xr-x 1 root root 210K Jun 20 2006 xli
-rwxr-xr-x 1 root root 6.9K Jun 20 2006 xlito

Why doesn't update-manager allow me to delete them and then just continue? I can really see no reason for completely aborting the entire upgrade.