Small typo in class name - has gone un-noticed since version 1.8. Actually does not show much difference in display...
In course/lib.php, line 466:
echo '<table class="logtable genearlbox boxaligncenter" summary="">'."\n";
should be
echo '<table class="logtable generalbox boxaligncenter" summary="">'."\n";
ditto for 1.9 and 2.0
Joseph