Little problem browsing lessons

Hello guy at Guitar Tricks,

First of all, it's a minor problem. Tonight I browsed the lessons by category using the links in the lessons tab page. If I click Exercises and scroll down to the Tips & Tricks, I see the category drop down menu. If I choose something different like Technique the page is rendered with no lessons. In other words, the drop down menu for the categories shouldn't be there at all. It's the same when browsing by difficulty from the lessons tab page but in that case it's the difficulty drop down menu that shouldn't be there.

Sorry guys at GT, but as a programmer I want to be aware of those little bugs. So here is the good place for it I think.

Regards

PS: I love following lessons on the site, reading reference library, chatting on the forums, etc. It's a high quality product you offer for a low price!