When using the version of IE 5 that came with OS X Beta, and downloading a file, OS X often launches Classic, and then Stuffit Expander, to attempt to decompress the file. This is not only a waste of time, but also falls firmly on the annoying side of possible outcomes.
There is, however, an easy way to avoid this problem. Instead of clicking a download link as you normally would, Control+Click the link and select the "Save this link to disk" option. Once you do that, a save box will open, allowing you to choose a download location. Once the download is complete, launch the OS X version of Suffit Expander (even better, download Stuffit Expander 6.0 and use that), and then drag the file to the Stuffit Expander icon in the dock. This will decompress your file, and save you the hassle of having to deal with the Classic Environment.
We will have more OS X tips and tricks in the weeks to follow, so stay tuned for more.