[SOLVED,,but still is mysterious] HELP: session problems

[eluser]akkumaru[/eluser]
i have the session class auto-loaded in my app,
then at that morning, i tried to load it again in a helper function (just curious),,
as soon as the change made, all of the CI session-setting codes seemed to be failed,,

i tried to restart the Apache server and MySQL services,
i tried to use the database-mode CI session, tried, and then changed it back,
i even tried to restart my computer,,but none worked

strange enough, this problem only happens only if i used the opera 9 browser,,
after restarted (and tried it again in the opera--only to see it failed again),
i tried running the app in netscape navigator 9, and it worked!!!
after that it worked in the opera too!!
and now i used the database-mode CI session,,

i really don't have any idea of what was happened,,
but now i can continue coding,,

thanks all,