Calling RO SDK from Javascript: Request Type 'OPTIONS' not supported

I had it all working, and now I get this error. I have no idea what causes this, running the megademo works fine, even in ‘offline’ use (index.html saved locally).

[14:36:39.479] OPTIONS http://localhost:8098/bin?1323869799477 [HTTP/1.1 500 500 Request Type ‘OPTIONS’ not supported. 247ms]

Any idea what could be causing this?

You may need to enable the SendCrossDomainHeader property in the server channel.

lServerChannel.SendCrossOriginHeader := true;

A bit different, but it’s working again. Thanks