Torches don't light the block that they are attached to when there is a block on top and at the sides of them

I didn't test this in 1.4.4 but in 1.4.2, if you place a torch at the side of a block, cover all of its sides and the top of it(don't place a block under the torch so that you can observe but I'm pretty sure that this problem even exists if you do) like in the pictures, you will see that the block that is occupied by the torch will be darker then the bottom of the torch. It is a lighting bug.