And confusingly the Release Notes says:
v1.75.0 - August 6th 2011 -- IE/Firefox/Chrome/Safari/Opera
However, after running the "universal installer", I have IE 1.74 not 1.75.https://lastpass.com/upgrade.php?fromwebsite=1&releasenotes=1
If you look at the release history, you can the intrabrowser versions are not always in sync.
Perhaps the release note or the available downloads will be fixed today.