Opening a PDF containing a maliciously crafted TrueType font in either Adobe Acrobat or Reader 9.3.4 could result in arbitrary code execution or a crash. Although the vulnerability affects all the platforms on which Adobe Acrobat and Reader run, the current exploits in the wild target only Windows. To be safe, rely on Apple's Preview, Smile's PDFpen, or another PDF application until Adobe closes the vulnerability with a 4 October 2010 release. follow link
Remove Excess Audio/Video from a Pear Note
If you ever find yourself in a situation where you used Pear Note to record a class or meeting, then forgot to stop the recording and ended up with an extra few hours that you didn't want, don't worry. You can crop off the extra recording. Just move the playhead to the end of what you want to keep, then select Crop Recording From Here from the Edit menu.
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Adobe Acrobat/Reader 9.3.4 Vulnerable to Malicious TrueType Font