Links to tags, groups, etc on dedupe pages are wrong

On dedupe pages which merge two contact records, such as:

/civicrm/contact/merge?reset=1&cid=4944&oid=11938&action=update&rgid=11

there is a problem with some of the links near the bottom.

Each record has a link to tags, groups, events, etc. These links all seem to be incorrect.

The incorrect links look like this:

http://ourwebsite.org/civicrm/contact/view?reset=1&force=1&cid=$cid&selectedChild=tag

So the cid has the value $cid rather than the actual value (14321 or whatever). Thus the links malfunction.

In a possibly related problem, sometimes the area where it normally says tags, groups, events, etc will just be blank.

It will look something like this:

Move related... Groups ====> Groups
Move related... Tags ====> Tags
Move related... ______ ====> ______

Instead of having a word there indicating tags, groups, events, or whatever, it is just a blank space. This happens to me only occasionally and I believe it is when the words would be "Drupal Account Information" (or whatever that phrasing is supposed to be) but obviously since it is blank I can't tell for certin.

This in under CCRM 4.2 and Drupal 6.