You need to get a life!
What is wrong with using netscape if you are more familiar with it anyway?
Do not believe you can have the last page visited like Netscape, unless you select this as the home page, or as a default.
Am not too famil with the changes in 5.5, but have you gone into 'start/settings/control panel/internet options' and checked whether there is a change to your selected home page. This Microsoft crap does many things without you knowing. Check that and let me know how you go. It could be something in the registry, so I will have to dig further.
Cheers yet again.
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When all else fails, read the manual!