OK, so I don't go to 'hot or not' and I had to read the message a few times before I understood what it meant. It's not a big deal I guess, but I'd agree with waste that it impacts on how others view the site. Something like "Note: Because of technical problems, you may occasionally see a picture you have already voted on. Please select "[ Goto Next Picture ]" for now."
Some other comments I'll add, I chose to use the exact text for the next pic link, including brackets, because it'll make it that much easier for the user (less thinking, so better navigation). Also, because this is a multilinational site, I think I'd go for english that is as plain and simple as possible. I left out contractions on purpose, and even thought about replacing "occasionally" with "sometimes". And I don't mean it to be taken as condescending, just that you'd want to communicate effectively with as large an audience as possible, many of whom may have limited english skills.
Anyway, just my $0.02. I realize that being a one-man site coder leaves little time to devote to such things, but it might be helpful to have a crew member who is very fluent in english spend some time reviewing messages for spelling, grammar, clarity, etc.
(n.b. - I realize I ended a sentence in a preposition.
