I have a Power Mac desktop running Snow Leopard. I just upgraded from Dreamweaver 8 to Dreamweaver CS4. I start a new html page and enter some text in the body. Now when I bold or italicize any of the text using the icons in the html property box, the text in the design window disappears. When I preview it in the browser it is there and looks like it should. I have spent hours myself and talking to Adobe to resolve this issue with no solution. Where do I go from here

Apple recommends that if you wish to go from 10.4 to 10.6 then you should purchase the <a href="http://www.amazon.com/Apple-MC581Z-A-Mac-10-6-3/dp/B002I0JKE2">10.6 Box Set</a>.<br /> <br /> <span style="font-weight: bold;">System Requirements to run Snow Leopard:</span><br /> <ul> <li>Mac computer with an Intel processor</li> <li>1GB of memory</li> <li>5GB of available disk space</li> <li>DVD drive for installation</li></ul> <span style="font-weight: bold;">Snow Leopard Installation Instructions:</span><br /> <ol> <li>Just insert the DVD in the optical drive.</li> <li>Restart your Mac while holding down the C key.</li> <li>You will be guided through the installation procedure and be prompted at one point to choose which install option you want.</li> <li>Once the Snow Leopard install is completed the Mac will restart itself.</li> <li>You will probably be asked to register with Apple upon restart.</li> <li>Enjoy Snow Leopard on your Mac!</li></ol> <b>Q: Can I upgrade directly from Mac OS X 10.4 (Tiger)?</b><br /> <br /> <i>A: Yes. Apple recommends purchasing the Mac Boxed Set for this purpose, which will also update iLife (it is unknown at the time of this writing whether older versions of iLife work with Snow Leopard) and iWork. Also note that while it has been said that the $29 upgrade will work with 10.4, it is not officially supported and may be in violation of the licensing terms.</i><br /> <br /> <b>Q: What happened to the different install options? Can't I do an Archive & Install?</b><br /> <br /> <i>A: Apple has revamped the familiar installation options for Mac OS X. You now have two choices, either a straight upgrade or a clean install. Supposedly if you choose to do a straight upgrade, what actually goes on behind the scenes is what was traditionally known as an Archive & Install.</i><br /> <br /> <b>Q: Is there anything I can do to better prepare myself for the upgrade?</b><br /> <br /> <i>A: Yes. It is advisable to run a Verify/Repair Permissions and Verify/Repair Disk in Disk Utility. You may also want to run the maintenance tasks in <a href="http://www.apple.com/downloads/macosx/system_disk_utilities/onyx.html">Onyx</a>. And finally, it would be wise to get your applications up to date using a program like <a href="http://metaquark.de/appfresh/">AppFresh</a>.</i>