Adobe has released Photoshop CS6 13.0.1 with fixes for two critical security vulnerabilities that could lead to malicious code execution. According to a Secunia advisory, this buffer overflow vulnerability occurred during a boundary error when processing a PNG image. In addition to the security patch, the new release aims for better stability with fixes for 31 specific crashing issues, and it provides a variety of fixes for 3D features and the Drawing and Graphics tools. ($699 new, $199 upgrade, free update, 7.9 MB via direct download, release notes)
Turn Off Filename Extension Warning
In Leopard, Apple fixed an annoying aspect of working with the Finder in Tiger. Previously, if you changed a file's extension, the Finder prompted for confirmation. But since no one has ever accidentally changed a filename extension, Apple thankfully added an option to turn that warning off in the Leopard Finder's preferences. Choose Finder > Preferences, and in the Advanced screen, deselect Show Warning Before Changing an Extension.