[X4U] can't save html file being viewed by browser

[zapcat]

I thought I'd help my web page workflow by "proofing" my page with 
Safari on another Mac on my ethernet network.
This way, I can have the browser window fully open on the proofing Mac, 
and the code window fully open on the authoring Mac.

It works pretty well except that sometimes, when I try to save my code 
file (text wrangler) I get a warning of some OS X error, and that the 
document is being used by another application. I do not always get this 
error/warning.

Is there something I can do to stop this from happening? I don't feel 
that a browser looking at a web page is the same kind of "use" as say, 
having an InDesign doc opened on one Mac on a network, then trying to 
open and work on the same doc on another Mac on the same network.

To me, the difference, is that Safari isn't going to write to the code 
document.

Any suggestions?

thank you!

zapcat