Just noticed a quick flaw which works with IE but not Firefox. I had a table where I was specifying the width. This was working fine in IE, but strangely Firefox was ignoring the width and scaling the table to match the width of the contents?
Turns out I was specifying the width as an integer without appending “px”. So width=100 tells IE to use 100 pixel width but Firefox ignores it. Change it to “width=100px” and both are happy…