Sometimes, as single pages and in framesets, the scrollbar on a Mac/InternetExplorer just never appears even if it "need" to be there.
I have set the scrolling attribute in the <FRAME> Tag to scrolling="auto" , as well as doing the same on the page itself by adding the scroll="auto" to the <BODY> Tag.
A bit up and down sizing of the window can sometimes solve the problem... however it also happens the scrollbars never appear.
I'm refering to Mac OS 9 IE 5.0
On PC IE/NS the problem is not present.