Just make sure, no matter what you do, that you cover your weed fabric with bright red mulch.
I mean super bright. Dyed artificial red cader. OHHH yeah.
Like 10 - 14" deep.
Weed fabric is really horrible. But, if you are seriously considering using it and haven't yet been dissuaded, I would suggest using a thick mulch over the top. Like bark chips. The thicker the pieces, the slower the decompisition rate. Therefore, you will retain your mulch longer and reduce the speed to which you "create" the soil above your fabric. Thick chunks will also have more space between them allowing for a better chance at the respiration tricky was speaking of.
Having been on the pulling out side of fabric and not on the installing of fabric, I can only say that it sucks. Not in the pleasant way either. It gets rooted in, it won't come out gracefully unless you don't want it to, and then it floats gently in the breeze where it has been hit with a trimmer, or pulled up a few inches by a curious child. If plastic has been used it can ( I had to remove this once) it can petrify leaving almost galsslike sheets under the soil that not only are a PITA but are unsafe.
Finally, John K, the arguments FOR weed fabric are few. The arguments against are many. Pre-emergents are the most successful in my opinion, and the safest to the desired plant material. I only hope that if you continue to install fabric, that you end up being the contractor that gets called back to remove it later on. I am confident that if you have to remove it a few times you will change your opinion. Its fine if you don't but I just hope for the rest of our sakes we don't have to remove your fabric.