phuile,
Thanks for your post. We looked at your site. The text labels on the widget tabs are there, they are just not being displayed properly due to the CSS styling of your WP theme. We verified this by examining the actual HTML elements output on your webpage. If you are using Google Chrome you can do this by right-clicking on the HTML element in question and selecting “inspect element.” This can also be done in Mozilla Firefox using the same technique.
The text labels on the widget tabs are actually being output below the tabs, which is causing them to be hidden by the content below. There are a number of things that could be causing this. We recommend you take a look at the div.nd-blockcontent
element on line 1420 of your theme’s style.css file. It is forcing a specific font, font-size and line-height (175%) — all of which could be creating the issue, as there is only so much space in your widget area. We recommend adjusting the line-height property, or commenting it out altogether, though keep in mind that this will affect ALL widgets in your sidebar widget area, not just WP User Control. So, it is best to experiment a little and make sure anything you change does not cause other issues.
Cheers,
-Bill