How to detect compatibility mode in IE and actual version?

What is causing "Webpage has expired" page to be displayed in IE 8?

• I am seeing a symptom in IE 8 where clicking a submit button on a particular web page is causing a "Webpage has expired" message. This is *not* a situation involving the back button, or a situation where the same form content is being posted twice. Also, the page has no 'expires' header, and no 'cache' related headers. So I know those vlaues are not involved. Can anyone tell me specifically what drives seeing this "Webpage has expired"? What I mean is, under the hood, exactly what is IE comparing to determine if this message is shown? It's obviously not the 'expires' header value compared to 'now' because this page specifies no value for 'expires'. Can anyone help? I have tried running IE in the 'IE 7' mode, and this does no good. As well as running it in quarks mode, and compatibility mode. Thanks----

• Answer:

  These sites have some possible information on the issue: http://www.linkroll.com/Data-Recovery-Computers-and-Technology--132579-IE-Web-Page-Has-Expired-Error-Repair-it-By-Yourself-.html http://shiflett.org/articles/how-to-avoid-page-has-expired-warnings (for PHP coded pages) You can always - particularly if you have another browser installed on your computer - try uninstalling and re-installing Internet Explorer 8 from the latest setup file available. Also, there was some type of I.E. 8 update available today (via Windows Update). If you are trying to run I.E. in different modes, you should try disabling extensions/add-ons one at a time to see if one is causing the issue. Plus, there are other browsers that can be used than the continually buggy Internet Explorer. See http://download.cnet.com/windows/browsers/ for options. Google Chrome is increasing in popularity. Other computer maintenance steps that might help... Clear your browser's cookies and cache. Completely clear your computer's temporary Internet files (http://support.microsoft.com/kb/260897 and http://www.mvps.org/winhelp2002/delcache.htm ). Update your computer via Windows Update. Do manufacturer updates. Defrag. Lastly, if it's an issue regarding expired certificates (http://windows.microsoft.com/en-us/Windows7/About-certificate-errors )... "If you encounter a certificate error at a website you've visited before without errors, it's possible the website is not configured correctly. Try retyping the address you're using. For example, if you're typing the address as https://example.com, try changing it to https://www.example.com. It's also possible that the website's certificate has expired and the owner or operator needs to contact the certification authority to renew the certificate to continue using it. This is a website-related problem, and can't be corrected in Internet Explorer. If you're getting errors on a website you've visited successfully, contact the website to report the problem." Yet if you are looking for a solution beyond the above advice, you may want to re-post your question in the Computers & Internet > Software category with information regarding your operating system and a link to the web page that you're talking about.