After my salutes disappeared the other day, I tried re-submitting the last one I'd done.
Now bear in mind this salute had been official for over a year, then read the below message I got.
"I have rejected this submission as a salute, because your sign is too small to be read properly.
Please click the blog link below and follow the instructions on how to make a proper site salute."
It didn't matter by the time I got this, but still made me laugh.