updated 05:25 pm EDT, Mon March 26, 2012
Apple posts stopgap release ahead of Mountain Lion
Apple has posted a new version of Safari, v5.1.5. The update is a minor one, simply resolving a glitch that "could affect website usability" when running in 32-bit mode. Separate Windows, Lion, and Snow Leopard downloads are available.
The release is likely just a holdover until the debut of Safari 5.2, which is already in testing by developers. It was introduced alongside a preview of OS X Mountain Lion, which may mean that v5.2 will be the default version of Safari in the new OS. Mountain Lion is scheduled to ship sometime this summer.