Hi guys! I have the same problem for a while with Firefox and Chrome on pc. Needs a couple of times refreshing of the page (F5). No problem with Android version.
this is defenitely an unloaded css file which is mandatory to have the proper layout displayed. We are still investigating this, it happens somehow for just a small group of users. At this moment there is nothing i can do right for you, just asking to press F5 and be patient. We are hoping this won't happens too often. Propably its an interrupted connection, while loading the files (might not be your fault).
If you think that it happens way too much, shout me a private message and i'll have a deeper look.