Svn resource out of date try updating updating a brick fireplace
The revision number is only relevant to the repository, and user convenience.It has no impact on any other factor of what you store in the repository.
The Subversion server (i.e., the repository side) is the same, except that it will not host a BDB repository on Win9x platforms (Win95/Win98/Win ME), because Berkeley DB has shared-memory segment problems on Win9x.
If you use an issue tracker to manage bugs, you can use the revision numbers to refer to particular patches that fix bugs -- for example, "this issue was fixed by revision 9238." Somebody can then run 'svn log -r9238' to read about the exact changeset which fixed the bug, and run 'svn diff -r9238' to see the patch itself.
And svn's merge command also uses revision numbers.
Collab Net pays the salaries of several full-time developers, and holds the copyright on the code, but that copyright is an Apache/BSD-style license which is fully compliant with the Debian Free Software Guidelines. Subversion has been in development since 2000, and became self-hosting after one year.
In other words, you are free to download, modify, and redistribute Subversion as you please; no permission from Collab Net or anyone else is required. A year later when we declared "alpha", Subversion was already being used by dozens of private developers and shops for real work.