I accidentally misclicked this morning and cleared my profile's custom CSS. However, I had the code saved so I thought I could just paste it back in and have everything go back to normal. But even though I put it back in a few hours ago (and it still shows up on the Profile page of the User Dashboard), my profile still looks like the default. I have cleared my cache and it hasn't changed.

Are there additional steps that I need to do to return it to how it was, or has this just not kicked in on Subeta's end?

You need to add the profile widget to your profile I think :) Go to your profile and do edit profile, then click on the profile widget

orz oh my god. Of course it was that easy! Thank you so much! 8)

Lock, please!