Microsoft VML had some security issues in 2006. Is it a good idea to use vml on a much traffic website?
This is the CSS forum and we don’t discuss VML :). You would be better off having this moved to some other forum section. I’ll ask a moderator to move it for you.
Found this information your might like
VML is pretty secure, just like SVG, if you want to make use of stuff like that you’ll need to use both as VML only works on IE and SVG works on everything but IE. 