Yes, that is "current path field"
I have windows 7, 4-cores CPU and 4 GB of memory and I don't think that my system is busy in that moment. Currently I found the reason, when I have more files in one directory 100 or more (600 in my case), some XLS files etc. so in that time when I change a directory and go back to previous there is a time lag in current path field. I tried to remove all of the files from that directory and then it was faster almost immediately, but when I put these files back it will happen the same situation the current path field is slower 1-2 seconds. D.