The toolbar with the STOP icon should be displayed and enabled earlier in the startup sequence. At present, if one has a startup or home page on the internet and there is a service problem, there are situations where the display hangs up searching for a site but with no STOP or 'breakout' method available. Cached files are used without checking to see if it is current. A simple timestamp check should allow changed files to be loaded over the cached ones. Table borders are thin lines which can be covered up by the cell contents.
Corners are also incomplete.
Table cell border properties are not observed correctly. Use my sample file and compare with MSIE 5. for border suppression. Most browsers will check 'set' value against needed and use the maximum of the two. Tables become confused if stacked more than two levels down. When lists are included in blocks that are centered, the list bullets are not centered but the text is.