When I add a new user to ownCloud 5, and also create a new group for that user, the spacing is not right on the group dropdown list until I hit reload.
Repeat:
Log in as an admin
Create a new user called Todd
Create a new group called marketing
The spacing looks odd as shown here:

but the spacing is odd only for the one new group
Then click create
The group list is not spaced correctly at all for any of the groups (new or existing) as shown here:

If I now reload the page it looks fine
Details:
ownCloud 5.0.5 running on openSUSE
Windows 7 Firefox (latest)