I've had this problem before, except in XP. Basically, I am having issues putting my icons right above my task bar, there is a bit of a gap where it won't let me put my icons. Just because I know I'll be asked, here's my icon spacing:
Icon Spacing (Horizontal): 43
Icon Spacing (Vertical): 43
Align Icons to Grid: On (I like to have them space out correctly, other than me trying to do it manually)
If I disable aligning the icons to grid it allows me to move icons into the space, however it's much harder to align them correctly. I'm not sure why this has happened, I turned on my computer one day and all the icons were messed up and I was no longer able to organize them the way I like. Here is a picture of what I'm talking about, you can see the space I can't put icons in is bordered with red.
If anybody has any suggestions on how to fix this, it would be grateful. I did a quick search and wasn't able to find anything.