This has been baffling me for a while. Of the machines I use in visitting Stack Overflow, two of them are machines with the same setup: Dell with Windows XP with IE8. Since they were issued to me by the same company (one to use in the office, one to use at home), they have identical setups as well. But they display certain page elements differently! One is an Optiplex GX620 desktop, the other is an Inspiron 9100 laptop, but somehow the hardware doesn't seem like something that should be overriding how my browser displays things. Nevertheless, the laptop seems to display things differently than what is expected.

Differences have included the following:

1. This issue persisted on the laptop after Jeff fixed it, but was repaired for everyone else and on the Desktop.
2. When viewing Vote Counts on a post, the grey line is left immediately beneath the upvotes but a number-sized white space is below that before the downvotes. On the desktop, it displays properly with the two adjacent and divided by a grey line.
3. Code blocks seem to have a blank line at the end on the laptop.

The following image illustrates how the last two elements look on the laptop.

So, considering that as far as I can tell, these two setups are identical (I have not messed with any settings and they were both initialized identically as well), what else could be causing the display difference?