IE cookie/session problem

We ran into an odd problem today regarding IE and cookies/sessions. We
have
one site running at the url 'dev.test.com ’ and another running at
'it.dev.test.com
'. Both of these site are using the exact same codebase, on the same
server.
Both work just fine in Firefox. 'dev.test.com ’ works fine in IE,
however ‘it.dev.test.com
does not. Using ethereal, I noticed that IE was not sending the
_session_id
cookie back when using the url ’ it.dev.test.com ’ though it does when
using
the url ‘dev.test.com’. Has anyone ever run into IE having problems with
cookies/session using a url like this?

Thanks for the help

On 6/21/06, Mark Van H. [email protected] wrote:

Yes. I seem to remember that this happened to us when we applied SP2.
This problem usually crops up when you have an underscore in the
domain name. This is wild guessing on my part (because I can’t find
any definitive explanation) but I think IE thinks you’re sending a
malformed url and doesn’t send the cookie as a security feature (on
the other hand, it could just be a bug…). It’s possible that IE (or
the programmer who added this ‘fix’) also objects to domain names of
more than three components.

Regards,
Sean