You can clone with
HTTPS or Subversion.
Forum attachments on the CI (and EE?) forums are non functioning and have been so for some time.
There is pagination problems to.
Any chance you could fix that?
See this post as an example:
Most of the team here consists of volunteers working solely on CodeIgniter, and are not related to EllisLab. Updates to their website should be directed to them via the forum or email.
EllisLab has been notified about this.
Seems to have been fixed. At least the attachment on the linked post is downloadadble.