Yes, it's that time again - tomorrow is Presto Test Day. Presto is the planned Fedora 11 feature which uses deltarpms (essentially packages which contain only the changes since the previous version of the package, not the whole data, to reduce size and increase transfer speed) for updates. Obviously we need to make sure this works reliably before we could include it in Fedora 11. It would be a big benefit for those on slow or capped internet connections, so please come by to help test it out! Unfortunately, you need an installed system to test: we can't test package management tools from a live CD. An installation of the Beta release is fine, though. The Test Day takes place all day on the #fedora-qa IRC channel - see How to use IRC if you're not familiar with IRC.