There are 1300 string of errors in that file and 3 more files called error.log.1 *.2 *.3.
I'll copy paste some of the last string:
[ Jul 29 2008 14:21:19 ] [80.86.154.134] :
The parent ID 150 of element with ID 150 does not point to the last entry which had ID 155, incorrect path would be calculated, aborting
[ Jul 29 2008 14:21:19 ] [80.86.154.134] :
eZContentObjectTreeNode::pathWithNames() failed to fetch path of node 836, falling back to generated url entries. Run updateniceurls.php to fix the problem.
[ Jul 29 2008 14:21:19 ] [80.86.154.134] :
The parent ID 150 of element with ID 150 does not point to the last entry which had ID 155, incorrect path would be calculated, aborting
[ Jul 29 2008 14:21:19 ] [80.86.154.134] :
eZContentObjectTreeNode::pathWithNames() failed to fetch path of node 894, falling back to generated url entries. Run updateniceurls.php to fix the problem. I'll try to run the updateniceurls.php and I'll tell you, this was usefull anyway thanks.