Here are some of the most interesting bugs of the past week:

Microsoft says that their component that processes JPEG images has a buffer overrun that may allow an attacker to completely take over your system (if the JPEG image was viewed by a user with Administrator privileges.) This affects: Windows XP Service Pack 1; Windows Server 2003; Microsoft Office XP Service Pack 3; Microsoft Office 2003; Internet Explorer 6;Visual Studio .NET 2002 and 2003; Microsoft Picture It; Microsoft Greetings; and more. Essentially, it's a company-wide bug, although older products aren't affected. This is a critical vulnerability, and Microsoft says to patch immediately. See the full list of vulnerable products, and find links to patches for these products here.

Red Hat has an updated openoffice.org package for Red Hat Enterprise
Linux 3. This fixes a security hole in the office suite OpenOffice.org.
Because of the way OpenOffice handles temporary files, a local user may
be able to break in and read the contents of another user's documents.
You can get this update here.

Apple says that after you install the Mac OS X 10.3.5 update on a Power
Mac G5 (Single Processor 1.8 GHz model), the computer's fans may keep
running even after the computer goes into sleep mode. If you want the
fans to sleep too, then get the Power Mac G5 Uniprocessor Firmware Update
5.1.5f1 from Apple. It includes other system reliability fixes, too.

You can learn about more bugs, incompatibilities and other things that go wrong with your computer daily at the BugBlog.