Answer

1) Open the tmpl/cms/cfg_archives.tmpl file in a plain text editor (either the copy from your server or from the original download package). Save a backup copy of the file.

2) Look for the following section of code (at about line 246):

<MT_TRANS phrase="This advanced feature allows you to map any archive template
  to multiple archive types. For example, you may want to create two different
  views of your monthly archives: one in which the entries for a particular month
  are presented as a list, and the other representing the entries in a calendar view
  of that month.">

3) Remove the second sentence of text, so that the code ends up like this:

<MT_TRANS phrase="This advanced feature allows you to map any archive template
  to multiple archive types.">

4) Save the file and upload it back to the server in ASCII mode, replacing the copy on the server.

You should now be able to access the Publishing tab (you may need to clear your cache or refresh so the new file will be loaded).