Don't know why, but suddenly had a brain thought in the middle of the night that I should check for a specific thing in my thesis. And it was wrong. Just a caption (should have been a figure, not a table) with one of my few in-text references wrong as well. Something I did late in the writing, but didn't pick up on, despite lots of checking at the time.
And it doesn't feel so bad. I was scared to look at the thesis before now in case I found anything wrong, but this is fine. I can draw up a list of such minor errors, and take them into the viva with me.
I'm sure I'll find more when I start to reread the thesis properly ,-)