warning: Load.php on line 1947

I refreshed my IE view while being in my joomla site (Frontend) and got entire page of error and warning messages. Before I was able to even start wondering where the closest defibrilator is to revive myself, the errors dissapeared on their own and i got about 3 lines of error messages above my template. All were reffering to smf. I refreshed again and only got one error message above the top of my page. Below...

Warning: session_start() [function.session-start]: open(/tmp/sess_5e242fea1dc4d4f504655670a9f8fd99, O_RDWR) failed: Permission denied (13) in /home/shopper/public_html/smf/Sources/Load.php on line 1947

I refreshed again and the site has been perfectly fine since. The forum works. I have not done anything to it today at all and as far as I know I did not have any users online either.

My heartbeat is back to normal, the blood pressure is still little high. I am wondering if anybody saw anything like that? I was not running my own backup on the site but could it be that I refreshed while the host was performing backup of whatever file my system was trying to get to at that very moment? That seems to be the only plausible explanation?

Just trying to avoid it next time...

thanks
k