This only applies to 1.0-RC7. If you are using subversion or a nightly build, this does not apply.
There is a bug in K2 1.0-RC7 which causes K2's layout to break with WordPress 2.7.1. If you are using or planning to update to WordPress 2.7.1 (which you should if you're using WordPress 2.7), you have two options:
Option A: Download the fixed info.php and replace the existing: k2/app/includes/info.php.
OR
Option B: Upgrade to the latest K2 nightly.
One more thing, there will be a 1.0-RC8 release of K2 and this release will not contain the K2 Sidebar Manager. Work is being done on a K2 Sidebar Manager to Widgets importer.
2009-02-18 Update: Added clarification.
The recent nightly builds did away with the page template: Default Template w. Comments. Their features have been consolidated into the default page/single template and can be activated through the use of Custom Fields.
To show comments in a page, add a new custom field with the name: comments and value: 1 (or on or yes, the value doesn't matter).
To hide the sidebar in a page or a single post, add a new custom field with the name: sidebarless and value: 1 (or on or yes, the value doesn't matter). You will now get a wide appearance without the sidebar when viewing the page or single post.
Does K2 work with WordPress 2.7? Well, this site is running 2.7, so that'd be a yes.
With regards to K2's Sidebar Modules versus WordPress' widget system, we've chosen to discontinue the SBM. Granted, the widget system isn't nearly as cool as the SBM's, but upkeep and maintenance is expensive for the two of us left, so...
This release fixes the bugs with SBM/Archives Page and WordPress 2.6. Subversion & nightly users: this release is revision 718. A list of bug fixes is here.
If you're using the K2 Sidebar Manager, you will need to turn it off in K2 Options before upgrading to K2 1.0-RC7. After you have upgraded to K2 1.0-RC7, copy k2-disable-widgets.php (found at k2/app/includes/) to your plugins folder and activate it. This applies to all versions of WordPress that K2 supports.
Download: K2 Release Candidate 7
Continue reading 'K2 Release Candidate 7 Released'