Today I thought I would try to build openjdk from source. Following the guide it says to install Mercurial 0.9.4 or newer, and also install the Forest Extension. The initial link for forest has a broken link for download, and a email to the maintainer bounced with unknown domain. The alternative link for a version post-1.0 release, does work, but the extension fails on Mercurial 1.7. I've supplied a patch to that version [ http://bitbucket.org/pmezard/hgforest-crew/overview/] and hopefully the openjdk documentation will work as currently document shortly. Whilst trying to get the Forest Extension working, it appears the preferred solution from Mercurial 1.7 onwards is to use subrepos which will be maintained by mercurial instead of via a plugin. So openjdk might need to switch to using subrepos and/or change the documentation too. I thought I'd let people know as I thought building from source might have issues, but I never thought getting the source in the 1st place would be the issue, which might put people off who want to help. John