TinkerTool 2.32 est dispo :
Problem: If screenshots are taken using shortcut keys (Apple-Shift-3 / 4) the resulting graphics files are always saved as PDF images. The file format option in TinkerTool is disabled.
Discussion: This is a feature of Mac OS X Jaguar. Apple has replaced the internal software for taking pictures of the screen by a completely new program. The new software is no longer capable of producing different file types. The resulting images will always be saved as PDF files.
As a workaround you can open the PDF file with the Preview application and select the menu item "File - Export...". The screenshot can then be saved to a variety of file formats. You can select between all file types for which QuickTime plug-ins are available in the system.
Some users are confused by the fact that this Jaguar feature is advertized differently in the help files of exactly identical system versions. In the original release of Jaguar, the documentation defines TIFF to be the format for screenshots. After the system has been connected to the Internet (not using software update), the Help Viewer will replace the documentation page by a new page which defines PDF to be the correct format (see image below).
We think it's a really bad idea to silently replace parts of the system documentation by new versions each time you launch the Help Viewer. Not only that this feature can slow down the Help Viewer to a crawl, and it shows how immature the documentation must have been when the system was originally shipping, it might even raise legal concerns: The user is not notified about this silent change in the operating system and its specifications. This might be considered illegal in some jurisdictions.