Some disks and partition management software (like Partition Commander and Partition Magic) are not prepared to work with disks (or partitions) format introduced in Windows Vista. And it will simply broken your disk, sometimes in the way, that even Windows Recovery Tool is unable to fix it. So, there is a good idea to find a good replacement.
If you just want to look into (or extract) contents of
.dmg file, a good, old and free 7-Zip will take care of this. This should also work for Apple
.sparseimage files. But, beware that (just like in case of
.iso files for Windows) these formats can contain bootable information and or whole disk images (Apple
.hps files), rather useless under Windows. So, for example, if someone tell you that he has Windows XP image ready to be used in VirtualPC for Macintosh, keep in mind that you rather won't be able to use in in Windows version of VirtualPC. Or you'll have a lot, lot of work with extraction, conversion, tune-up etc.
If you're using both Office 2007 and 2010 (for example on two different computers) for editing the same document and you have some automatic fields inside document edited in Word, you may find that they're not properly updated.
When you go to
Options for changing Ribbon settings, in your Word 2007 or Word 2010, you can see a small button at the bottom of button list letting you to change keyboard shortcuts for most areas of you text editor. When you go to exactly the same place in your PowerPoint 2007 or 2010 you my (surprisingly?) notice, that there is no such thing. Googling around the web let's you discover that this is... normal situation!