On Safari 8.0.8 I have the issue that on the pages:
https://www.xing.com and https://www.linkedin.com the 1Password extension fills out the registration / signup form and not the login form. So I can't use the extension, but have to search and copy over the menu bar helper, which is a bit annoying as it takes much more time.
1Password Version: 5.3
Extension Version: 4.4.3
OS Version: OS X Yosemite 10.10.5
Sync Type: Not Provided