It isn't safe because it allows nefarious sites to hide or spoof the hrefs in links.
That would make sense, Windows 98 does not release its resources after closing a program. A simple reboot ususally resolves that problem.
A stack-overflow error happens when memory reserved for internal communication between Windows and certain hardware devices is used up.
IE by default shows this staus bar scrolling but FF needs to have the setting manually set, this is why FF is so much more "safer" that IE.
I don't seem to have a file named Registry in my /etc.
This status bar spoofing is one of those things that's most dangerous with semi-experienced users. Experienced users either disable that capability or understand it can't be trusted otherwise. Bright green users don't even know what it is and may not even have the status bar viewable. But those guys in the middle that "know" that the status bar either has the url of the hovered link or a page-generated message will miss the fact that "page-generated message" my look exactly like a url.
"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." Brian W. Kernighan