Not long ago Mozilla changed the release cycle of Firefox, so that major new versions (Firefox 5, 6 and so on) will be released every 2-3 months. Currently, the latest alpha release is Firefox 6 Aurora, while the latest beta development version is Firefox Beta 5, which has made it into the Firefox Next PPA already.

After many comments about it, I've decided to make a separate post as it seems everybody wants to know what theme this is even though there was an announcement on ppa.webupd8.org.
Firefox 4 (stable) will be released soon and I though I'd let you know how to install it in Ubuntu 10.04 and 10.10 - the proper way.
There are a lot of amazing GTK / Metacity / Emerald / Icon themes on Gnome-Look and Deviant Art but to get the latest version you must constantly check the site and manually download and install the new theme so I though it would be nice to set up an Ubuntu repository for the themes that I (and you) like and do not have a PPA.
Launchpad-Getkeys is a script (comes packaged in a .deb) that automatically imports all missing GPG keys, even if you're behind a firewall.
How do you know when you have a missing GPG key? Here's an example: when you run "sudo apt-get update", you'll see some errors like this:
[...]
Fetched 47.0kB in 6s (7,710B/s)
Reading package lists... Done
Ubuntu Tweak 0.5.10 was released today bringing mostly bug-fixes but also 2 new features:
- Automatically disable broken software sources
When you start Ubuntu Tweak, it disables broken software sources (PPAs, etc.) and notify the user to make it easy to fix:
The Launchpad API was updated yesterday, finally bringing PPA statistics. For now, the stats can only be accessed by using a Python script, but they will probably be implemented on the actual website soon, especially since Mark Shuttleworth is also interested in these stats. He actually posted a comment on Launchpad, asking for a "heat" metric for PPAs:
Firstly, an introduction so you'll know what this is about:
The Ubuntu Font Family has been made default in Ubuntu 10.10, it can be downloaded from Launchpad and there are download links available on http://font.ubuntu.com too, yet the Ubuntu Font PPA is still private which makes it difficult for those not using Ubuntu 10.10 to stay up to date with the latest versions of the font.
So I've decided to make a PPA [...]
A quick reminder of what's PPA Purge:
gThumb 2.11.5 was released 2 days ago and is now available in the WebUpd8 PPA. New features in this version include:
So what is PPA Purge? Well, imagine you add a PPA repository which messes up a lot of stuff on your computer. PPA Purge can be used (with a single command) to remove that PPA, remove everything installed from that PPA and reinstall the original packages from the official Ubuntu repositories.
I just posted about a PPA which has a fixed Light Themes package for Lucid, but that PPA doesn't have packages for Karmic and Jaunty and also that package replaces the original Light Themes.
Mohegan asked if we could upload a fixed light-themes package in the WebUpd8 PPA and so we did, but we tried to please as many people as we can, so:
Ubuntu Lucid (10.04) Light Themes (Radiance and Ambiance) - click me if you haven't seen the themes yet - will probably be updated lots of times until Lucid Lynx is released.
VLC 1.1.0 and gThumb 2.11.x, both from GIT, have been available for some time in the WebUpd8 PPA and both applications got an update recently (today for VLC and two days ago for gThumb).
Other changes include:
I still recommend using Swiftfox over Firefox, but if you really want to use Firefox, there is a PPA (many people might prefer this over the Mozilla Dai