Software Update just alerted me that Safari 5.1.5 is available. As noted on the screenshot above, the only information from Apple was that the update "contains a fix for an issue that could affect website usability when running Safari in 32-bit mode.
The update is small -- only 46.4 MB -- and does not require a restart.Safari 5.1.5 update fixes issue when running in 32-bit mode originally appeared on
