I just posted this review on the Chrome Store.
As Linda Gurley has written, the Chrome extension requires repeated re-installation.
This occurs for me on both OS/X Chrome and Windows 7 Chrome. Now that I know how to correct, I do this every time I reopen Chrome:
1. Delete 1P Extension
2. Close Chrome
3. Open 1Password, and use Preferences to Install Chrome Extension (don't use the Chrome Store)
4. Repeat.. repeat.. repeat..
Agilebits has three entries on the Chrome Store, which don't indicate the version. That's an annoyance which should be corrected.
Yes, I've followed all the help guidelines offered by Agilebits. Since the problem occurs on both Mac and Windows platforms, perhaps it is related to sync?