when you start the "MediaPortal LogsCollector" from the Windows Start Menue, then you have the option to change the path and the name of the exported zip in 2 ways.

1. directly type into the "frame" inside the settings section
2. use the "browse button" to set location and name

Option 1 is not working. You can type in whatever you want, it will always use the default location.
Option 2 does work like a charm.

h4. Additional Information
reported in forums, confirmed by infinityloop
http://forum.team-mediaportal.com/1-0-rc3-svn-builds-288/mp-log-collector-doesnt-respect-edited-filename-46649/