[pcabc]

Can MyBB support  Scalable Vector Graphic (SVG) as an image type?  It does not allow them to be uploaded?  I'm updating my charts and I can highlight curves when I put the cursor over a line in SVG, but that does not work once it is converted to a PNG.

No, this isn't a file type that I'd want anyone on the site to be able to upload, as being made up of code, it can contain malicious scripts. So has to be restricted to just images I'm afraid for security reasons.

 
A bit of a shame but I see where you are.  Worth waiting to see if someone comes out with a more secure version that strips out the potentially threatening bits.  Just stripping out the script tags should do it, but there are probably more people wanting to do interesting stuff with javascript than those wanting to strip it out, at least in limited circumstances.