[TYPO3-english] felogin ie8 session cookie

[Roman]

Currently I run several sites on one typo3 installation (version 4.3.1). 
A frontend user can perform the login but once he accesses an other page 
his identification gets lost.

Reading around I found that the compatibility mode might break the 
session. Therefore I added <meta http-equiv="X-UA-Compatible" 
content="IE=8" /> to the page header and veryfied the page to be valid 
in html, css and js.

When deleting the session cookies (through developer tool bar and not 
closing the browser, hence session) the auto logoff disapears and 
everything works fine.

As well I observed that the cookie domain isn't denominated correctly. 
In firefox the domain value is .venandar.com where in ie8 one just finds 
.com.

As well I read that upen setting [SYS][cookieDomain] the problem might 
disapear as well but using this parameter on a multi domain installation 
doesn't seem to be aproriate.

Does anybody have experiances on this issue?

Thanks for any input, Roman