Frost134 :
Rosewill Lineglow ATX Mid Tower
While I cannot answer with 100% accuracy - that case will have the tabs. Rosewill is not exactly a top quality brand, but they do make decent parts at usually great prices so I like them (especially for cases and similar non-critical parts)
From one of the first newegg reviews of the case I saw: "The rear panel screwholes are a little bent, while not affecting the case, are not really great"
Looks like someone else has gotten one of those cases with some minor damage to the rear panel - so I really wouldn't be surprised to see that the one you got has some minor damage nearby.
For what it is worth - I bought a Fractal Define R3 case about three years ago and the rear panel was damaged on it (with no damage to the box so it wasn't from shipping). And that is a case that retails for twice the price of yours. Sometimes __it happens.