The second release candidate of Ubercart 2.0 for Drupal 6 was packaged up today for your immediate consumption. This release follows hot on the heels of our first release candidate and includes a few important variable name typo fixes and several other bug fixes that were unearthed by people like you. All the changes are listed in the release notes.
Thanks to all those in the community who chipped in to make this a fun, fast bug fix release! We had 10 direct patch contributors in just a week and a half.
So... despite the hesitation expressed toward our versioning, when you have to make changes, you have to make changes. We intended to make a change before the RC1 but spaced on the timing. As a result, we've had to introduce a change between the RC1 and RC2, but I assure you, I would've wished to nail down the issue much sooner.
Without further ado, then, the Recurring Fees module has been moved from the core distribution into contrib space. It is available without modification from http://drupal.org/project/uc_recurring. The module has been languishing for some time now and has always lacked one feature or another to truly be useful for our users. As such, any development on that module would hold back the Ubercart release cycle, and any movement on Ubercart would hold back the restructuring needed in the Recurring Fees module. In its new home, it is now free to develop unhindered and without hindering Ubercart.
Sites currently depending on this functionality should update to the latest version of Ubercart. The store module includes an update function to disable Recurring Fees if it is currently enabled when you run update.php. You should then make sure you remove the uc_recurring directory from your ubercart/payment directory. Finally, download the latest 1.x version of UC Recurring from its project page and install it to be back in action.
Community member univate has spearheaded the brainstorming and patch generation effort for what will turn into the next version of the module. If you've ever had a beef with the limitations of the core Recurring Fees module, now is your time to do something about it! Help him develop and review changes so the module can have a strong 2.0 release and a bright future.
So, to summarize the release... less bugs, one less module, and a whole lotta potential for the future. Back up those sites and databases and get to testing.
We'll be at 2.0 before you know it!