My fixed top navigation bar has five links of equal sizes: the three on the left go to content-related pages; the two on the right access user account functions. One link, "Register," opens up the user registration page. The other, "Login," however, produces a modal view in the horizontal center of the screen. This seems like maybe it is inconsistent because the other navigation links take you places, but the login link does not. However, I feel like I implemented this pattern subconsciously mimicking other sites I had already visited.
Do you think that one link opening a modal while the others navigate to a page feels "wrong?" And either way, can you suggest a better place to present the login link that that will somehow make it more obvious that a modal view is coming?