Currently the dialog that notifies the user about failed subversion command points to the following download page for the client software: http://www.open.collab.net/downloads/netbeans/
However, for Mac OS X, the direct links is http://www.open.collab.net/downloads/community/ (2 mouse clicks away from the page above).
the address http://www.open.collab.net/downloads/netbeans/ was agreed with collabnet to be the entry point for svn client downloads for netbeans.
I suggest we do not break the contract in hard linking references to their web. Maybe we should ping them instead, and see if they are able and willing to fix it on the mentioned page. Anyway - it also looks like the contents there aren't uptodate anymore.