This is the public issue reporting system for the SBML specification. Everyone in the SBML community is invited to report issues (such as typographical errors, lack of clarity, logical errors, missing information, etc.) using this system for any of the SBML specifications.
To create a ticket to report an issue, you must first log into SourceForge. Once logged in, a button for "Create Ticket" will become available in the left-hand column. (You can register for a SourceForge account for free.)
The current SBML specification documents are made available from documents page on SBML.org.