Random "locked out" message.

Is anybody else having issues with their account being locked? It seems random for me and sensitive to which link I click on to enter the site.  As an example, I clicked on the embedded link inside an email this morning and when logging in it says locked out.  But when I went to my favorites shortcut to the support site, it accepted my user name and password.  I've already reset my password a couple times and done cache and java clears.