The Security Update released the other day has its good and bad side, users report.

Good news first: apparently the keyboard glitch that plagues MacBook and MacBook Pro users who’ve upgraded to Leopard where keyboards freeze for up to over a minute when using Carbon apps has been solved with the Security Update.

Bad news: under special circumstances, the new Security Update can cause crashes in Safari. Changes made to address security issues in the app inadvertently crash Apple’s own browser, particularly in handling frames. The Mac Observer’s coding expert, Steven Swift observes the problem -

The error happens when the user tries to submit a form to another target frame or window. Safari stops that, and, in fact, crashes. The idea is to keep any malicious hacker from, for example, trying to load code into a hidden window.

The problem seems to be specific to Safari, and does not affect other browsers like Firefox and Omniweb.