Can't recognize image extension error

[DJ Dunkerley]

Okay I know this can be done because there private investments forum using Invision software that are doing it.

We need to be able to embed images from bigcharts.com which wrap their stocks charts in an iframe like this:

http://bigcharts.mar...=579&mocktick=1

Currently the forum gives us the usual "can't recognize image extension" error so now everybody has to save the image on their desktop and then upload which is cumbersome.

I'm pretty new to Invision so I thought it would be an easy thing to allow all images and turn off the image extension filter but it's not. Now I'm a bit under the gun because OTHER investments forums have figured out a way to allow easy cut and paste I haven't yet so far.

Any help would be appreciated.

cheers, DJ