we are just in the progress of a series of cleanup/performance improvements of the content repository, which we have tested so far just for the upgrade scripts (the latest version runs on openacs.org) and not jet for fresh installs. I have fixed the problems above.
Actually, the default for fresh installs in install-oacs.sh should be the released tar versions, and not the CVS version. I've changed this in the install scripts on github as well.