Log file/Easy

Someone has asked you for a debug log (aka log file, XBMC.log, etc). This is what they want you to do:

Removing passwords
Use these steps if you use sensitive passwords in your network shares:

This portion of the guide is still a work in progress. If you use passwords for your network file shares, then you might have to remove them from the debug log. This might not be the case for most people using SMB/Windows file sharing, even if you are using a password (XBMC should strip passwords out of the logs for SMB), but you might want to check the log file just to be safe.

The basic gist is you have to manually copy your debug log file (see here for location) and use a find/replace text editing tool to remove your password with something like a bunch of asterisks. Then just manually paste that onto a new paste file on http://xbmclogs.com and copy that URL to the forum post you posting in.

More info
For more info about the debug log see Log file/Advanced.