A typical problem is the following: when a user has the viewport at a size that makes the outer container 999 pixels wide, if the first column is 60% and the second is 40%, IE 6 will always calculate the two columns as 600 and 400 pixels and as a result, the two will not fit (600+400 = 1 more than 999) and it will drop the second column. This is obviously not intended behavior, and in a world where we still have to use floats for columns (I can't wait for display:table support across all browsers), it's important to work around this problem. I used to give my last column 1 less percent (in this example, it would have 39% instead of 40%, but this would usually result in columns that don't quite fill up the container. Of late I have been giving the last column .4 less percent (in this example, 39.6%), which seems to work perfectly. Browsers will calculate this width and round up, but it will still fit even with an odd container width like 999px and I won't have to worry about dropped columns.
Jochen Burkhard on 18 Apr 11"As CSS3 becomes more robust and is more widely supported, the options for fun modern design elements that can be created without graphics are virtually limitless! For a recent project, I decided to see if I could create a centered ribbon banner with pure CSS3. This tutorial will walk you through how it was done. As it turns out, it's actually quite easy, using only simple, semantic HTML and some CSS3 trickery thanks to the magic of the the border-width property. The only caveat: As with all new CSS3 techniques, it can act a bit wonky in some IE browsers… we'll address that at the end of the tutorial. Here's how:"
