Apple has quietly released the iMac Graphic FW Update 3.0, saying only that it “fixes a graphics issue that may cause an iMac to hang under certain conditions.” It’s conceivable that this will play a role in resolving the video-related crashes new iMac owners were experiencing under Mac OS X 10.7.0 Lion, though most of those seem to have disappeared with 10.7.1 (see “Video Viewing in Lion Freezes New iMacs,” 4 August 2011). Apple does indicate that this latest firmware update requires Lion, though the company doesn’t say which iMac models are affected. Frankly, though you can download this from Apple’s Web site, we recommend letting Software Update get it for you, since then the download will appear only if it’s relevant for your iMac. As with all firmware updates, be careful not to power down your Mac during the update. (Free, 482 KB)
Is it a Unicode Font?
To determine if your font is Unicode-compliant, with all its characters coded and mapped correctly, choose the Font in any program (or in Font Book, set the preview area to Custom (Preview > Custom), and type Option-Shift-2.
If you get a euro character (a sort of uppercase C with two horizontal lines through its midsection), it's 99.9 percent certain the font is Unicode-compliant. If you get a graphic character that's gray rounded-rectangle frame with a euro character inside it, the font is definitely not Unicode-compliant. (The fact that the image has a euro sign in it is only coincidental: it's the image used for any missing currency sign.)
This assumes that you're using U.S. input keyboard, which is a little ironic when the euro symbol is the test. With the British keyboard, for instance, Option-2 produces the euro symbol if it's part of the font.