How to reproduce:

1. set short urls to create view prefixes like http://localhost/foswiki/Sandbox/WebHome
2. create a topic called Foswiki
3. save
4. when visiting the url http://localhost/foswiki/Sandbox/Foswiki, you'll see Sandbox.WebHome instead

The error is in Foswiki::Engine::CGI.pm where the SCRIPT_NAME is removed from the PATH_INFO this is done using something like

   $pathInfo =~ s/$scriptName//i;

This will erase any non-case-sensitive occurrence from the path. Obviously this is poo. It must only replace SCRIPT_NAME from the prefix of the PATH_INFO.

Changing this to

   $pathInfo =~ s/^$scriptName//;

This bug is present in any foswiki versions available.

-- MichaelDaum - 03 Sep 2010