Prototype 1.5.1.1 released – upgrade now! Posted byBramus! June 20, 2007 Leave a comment on Prototype 1.5.1.1 released – upgrade now! “This is a bug fix release that prevents crashes with versions 1.3 and 2.0.x of the Safari browser. We urge everyone using Prototype 1.5.1 to upgrade to this latest release.”