New user, first time poster, be gentle.... :-)
1Password for Windows V126.96.36.1994 (also happens on my iMac)
Chrome plugin 188.8.131.52
Firefox plugin: 4.5.3
A few sites seem to not recognize the value in an autofilled field. Case in point is the HostGator billing login page at https://portal.hostgator.com/login
Using CTRL\ fills the proper email address and password into the login form, but clicking the Login button results in an "Invalid email address" message. If I manually type in the exact same address over the autofilled one, then it works.
I have deleted the entry and re-created several times with no change in behavior.
Thanks and regards,
1Password Version: V184.108.40.2064
Extension Version: 220.127.116.11
OS Version: Windows 7
Sync Type: Not Provided