I was able to see that the text boxes for some of the items were off by 1 pixel and have fixed it.
I also went through the rest of the pages to make sure the icons are all the same size and located at the exact x,y co-ordinates and even made sure that they were showing as completely in the middle of the "cross-hairs" of the guides I use, by making sure the lines are dark to indicate I have the middle.
Looking a lot better now.
Thanks for your help.