This had surfaced a bit earlier from other posters but seemed to have
been
left unanswered.

After SP5 we are requested to authenticate on every page of our IPrint

website (it didnt ask before).

Here's an example:

1. go to website main page = no authentification required
2. click to go to other subpage on the website = authentification
required
3. press back button an go to our main page again = no
authentification
required
4. select either the same previous subpage or another subpage =
authentification required again even though I had just authenticated.
Again this only occured after SP5, rolling back to SP4 isnt possible
since
SP5 resolved alot of our problems and only created this one which the
user
gets to "enjoy".