@dkendig said:

Have either of you tried our 1.6 beta, or tried SketchUp 2013 (Make or Pro) that was released today? I can't recall if it was one of our bugs, or a SketchUp bug with their observer system, but I believe this may be resolved now. If you still have the issue with our beta, you can supply us with an example scene and a bug report (send an email to vfswip@chaosgroup.com), we could test it ourselves, or you could install those updates and try it yourself. Just as a heads up, we are rather busy at the moment with our beta, so I wouldn't expect a speedy result from us testing. However it is tested, if the end result is that a bug exists in our product, please let us know so we can have this resolved in our next public release!

Dave,

I sent you at vfswip@chaosgroup.com a 19 megabyte Sketchup file and the email address rejected it:

Delivery to the following recipient failed permanently:

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain chaosgroup.com by mail.chaosgroup.com. [195.34.120.71].

The error that the other server returned was:
552 5.3.4 Error: message file too big

Do you have another point of contact?