The source for new version 1.2.3 is't avalaible.
Are you sure? This works for me:
`svn co https://pdfcreator.svn.sourceforge.net/svnroot/pdfcreator pdfcreator `
And http://pdfcreator.svn.sourceforge.net/viewvc/pdfcreator/ shows pretty steady activity, with r884 (2011-Sep-07) saying "Set version back to 1.2.3"