Filed under: OSOut of some behind-the-scenes frustration on the TUAW team email list, we seem to have discovered a quirk in Mac OS X 10.6.4. Using the built-in screenshot tools, you can copy a screenshot to the clipboard using Command + Control + Shift + 3 (or 4, for the crosshairs screenshot). From there you can paste into Preview or Mail or any other application which can take images from the clipboard.
The issue presents itself when you paste into Mail.app or Mailplane. Instead of using your preferred format for screenshots, the images are pasted as a TIFF file. Several TUAW staff members were able to re
