I upgraded my Xibo 1.6.4 to the latest 1.7.4 recently with no major problems. I noticed that Firefox 38 (my current browser of choice) breaks the Scheduling interface completely. My current work around is to use MSIE 11. (any known issues or workarounds?) I cannot upload images to show the symptoms as I am a new user.
Normally I am not using firefox, but I just installed it 38.0.5 - and it seems fine.
Could you please take screenshots and upload them on dropbox(or similar) and share here with us?