So, while the servers I run are all SQL 2005, I'm using the SQL 2008 tools for editing. Along with the inherent difficulties I find with Intellisense, there's another minor issue which turns out to be Virtual Space.
In Virtual Space mode, the Editor acts as if the space past the end of each line is filled with an infinite number of spaces, allowing code lines to continue off the side of the visible screen area. (MS Books Online)
Which means that my years of keyboard training require re-training. For instance, if I'm at the beginning of a line and want to go to the end of the previous line, hitting the left arrow key no longer works. Instead I need to hit up and then end. Also, if I click on a line and my mouse is over to the right part of the screen, my cursor ends up waiting for me to type with lots and lots of white space to the left.
Now, I'm not complaining about the ability, but I do wish it wasn't turned on by default, since that was a "breaking" change that requires me to adapt to the software. Fortunately, turning it off is as simple as Tools, Options, Text Editor and clicking on the check box for Enable Virtual Space to turn it off.
Oh, and an addendum to the Intellisense post, if you have a table or view that is named Selections and want to do a subquery, the following line of code will cause you grief:
SELECT * FROM Selections WHERE pki IN (SELECT
I say that because the SELECT keyword will translate into Selections unless you right arrow.