Weird results from who and finger
 

My machine (running Slackware 8.0 on the 2.4.8 kernel) is telling me incorrectly that I've got some terminals open from nearly a week ago:

me@box:$ who
me pts/1 Oct 14 11:22
me pts/0 Oct 8 15:50
me pts/4 Oct 8 15:50
me pts/3 Oct 8 15:50
me pts/5 Oct 8 15:50
me pts/6 Oct 8 15:50
me pts/7 Oct 8 15:50

Only the first line is (or should be) correct.

Then, when I run finger, I get:

me@box:$ finger
finger: /dev//pts/0: No such file or directory
finger: /dev//pts/4: No such file or directory
finger: /dev//pts/3: No such file or directory
finger: /dev//pts/5: No such file or directory
finger: /dev//pts/6: No such file or directory
finger: /dev//pts/7: No such file or directory

This is followed by the usual finger stuff (user info, .plan, etc.), though the column "Tty" puts an asterisk before each of pts/[043567], as in:

me Me *pts/0 Oct 8 15:50 (:0.0)

What could cause who and finger to display such information?