CGI-Enurl is in both repositories however one is linux and one is windows. 
ppm> s cgi-enur
Searching in Active Repositories
  1. CGI-Enurl [1.07] Encode strings, arrays and hashes so that they m
+ay be appended to URLs as queries
ppm> describe 1
====================
Package 1:
    Name: CGI-Enurl
 Version: 1.07
  Author: Jan Krynicky (=Jan Krynicky) (Jenda@Krynicky.cz)
   Title: CGI-Enurl
Abstract: Encode strings, arrays and hashes so that they may be append
+ed to URLs as queries
Location: ActiveState PPM2 Repository
Available Platforms:
       1. MSWin32-x86-multi-thread-5.8
====================
ppm> upgrade cgi-enurl
CGI-Enurl 1.07: new version 1.07 available in ActiveState Package Repo
+sitory
ppm> describe cgi-enurl
====================
    Name: CGI-Enurl
 Version: 1.07
  Author: Unknown ( )
   Title: CGI-Enurl
Abstract: Encode strings, arrays and hashes so that they may be append
+ed to URLs as queries
Location: ActiveState Package Repository
Available Platforms:
       1. i686-linux-thread-multi-5.8
====================
ppm>

[download]
For some reason it appears that PPM is always checking "ActiveState Package Repository" first or giving it priority. Turning off that repository causes the correct results to be reported.

In reply to Re^2: PPM mis-identifying / failing to upgrade some module upgrade candidates by terra incognita
in thread PPM mis-identifying / failing to upgrade some module upgrade candidates by davido

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