OpenLayers 2.9 Final Release
The 2.9 release adds a number of important features, the full list of which can be found in the Release Notes, at http://trac.openlayers.org/wiki/Release/2.9/Notes Some of the highlights include:
- Graticule control
- Support for image layers tiled using the Zoomify storage standard
- Atom Format
- Catalogue Services for the Web (CS-W) Format
- Refresh strategy for vector layers
- Basic Sensor Observation Service (SOS) support
- TransformFeature control
- WMS 1.3 support
- a lot of memory leaks were fixed
... and many other new features and bug fixes that you can see detailed in the release notes linked above.
For information on possible changes that will need to be made between this version of OpenLayers and previous versions, please look at the Release notes, available at the Release Notes information.