I'm having the same problem as the original poster. I installed the plugin and the tabs are displaying one above the other, instead of next to each other. I've spent some time testing out some changes to the CSS and I can't get them to appear one next to the other. Anyone have an idea about what needs to change to get them to line up next to each other?
I already tried switching the theme to Ten Twenty, to see what the styling that they provide for that theme looks like, and it looked just like it should - the tabs were right next to each other. So I think it has to do with the way that the plugin is interacting with my theme. I tried using those styles with my theme, but it didn't work right. I can't figure out what my theme is dictating, style-wise, that is preventing the tabs from showing up next to each other.
Any help that anyone can give me would be much appreciated! Thanks in advance.