We're seeing a few reports of folks not having the login buttons available. This is because of an old stylesheet still being cached in the browser. You can generally solve this by holding shift and refreshing the page. (You can also empty your cache or use a different browser, but the shift-refresh usually solves things.)
Ruka site news
We're aware some users may see courses missing from their dashboard. The update to fix this issue is in progress and should be complete in the next couple of hours. Thank you for your patience as we resolve this.