It's been a while, so grab it while it's hot!
This release fixes various issues reported over the past few months, improves documentation, example code and the installer, and features a brand new build system. (Detailed release notes)
The new system is based on MSBuild and is more maintainable, faster and fully automated: version numbers, installers and and releases can all be generated with a single click. It has been tested on Visual Studio 2010, MonoDevelop 2.4, msbuild 4.0 and xbuild 2.6.7. Visual Studio 2005 and 2008 will no longer be able to build OpenTK.
This is not as bad as it sounds. OpenTK still targets .Net 2.0 and can be used in VS2005 and VS2008 just fine (you just won't be able to build OpenTK itself through those IDEs). This move was necessary for the upcoming .Net 4.0 builds.
The next release will focus on proper OpenGL 3.3/4.1 support and should be ready in about two weeks. A buildbot will supply nightly builds in the meantime (details to be announced shortly).
Till next time!