this "bug" happened to me after i uninstalled superantispyware(I don't say that's the cause of it). The thing is previously I could use almost the whole taskbar for minimizing applications. Now this little line showed up and it limits the space for minimizing. Hard to explain, I'll use pictures.
This is how it is now
So when i minimize programs, they cannot go pass the line I circled with red. I tried moving the damn line to the right, but it just won't move!
I was sure, previously when it was all good I could use that space between the circled line and the line to the right, but now I can't.
Not a big problem, but it is really annoying for me. God bless whoever can fix this problem for me.