It occurs here, too, and reproducible. The entry-dialog pops up right after login.
The problem is, that gnome-keyring is stupidly grabbing the entry focus, regardless if it has the window focus. The only solution is to enter a password.
I can see that there is a good intention behind this (avoid that people mistakenly enter the keyring password into another window), but this behaviour is very unexpected in X context, and as such it is extremely annoying, especially if other dialogs appear at the same time or slightly later, as it often happens after login.
This bug is also described here: