We run a website on a subdomain (mysite.abc.com) while other parties within our company operate various other websites on the main domain and other subdomains (www.abc.com, anothersite.abc.com, etc.). Our site is ColdFusion-based, as are a few of (but not all of) the other abc.com websites.
We started to encounter recently a problem in which our users key their log in information into our log in page and click submit only to have the page refresh. No failed log in attempt, just a page refresh. I have seen the issue primarily in Firefox, but I believe this is just because our users perfer that browser. I am unable to recreate the problem on my end, but then again I rarely use Firefox and don't often visit the abc.com websites outside of our own.
The only fix that seems to work is to clear the browser's cookies entirely, or if the user objects to that, just the cookies for "abc.com". Doing so lets the user log back into our website (again, at mysite.abc.com) fine. I do not have to clear the cookies for mysite.abc.com, so I'm lead to believe this is a result of the main domain's cookies somehow conflicting with our own.
Any thoughts? Has anyone else experienced this?
EDIT: I haven't had a chance to test which of the main site's cookies is causing this, but I'm assuming it's the CFID/CFTOKEN. I'll know more once another user encounters it, assuming I can spend some time on their computer to do testing, and not have to rush-fix the problem so they can continue working.