Very small annoyance in the grand scheme of things, but I wish TV and film companies would drop the habit of showing the copyright/production date in Roman numerals. I know that the digital TV guide often shows the year that a film was made, but on the occasion when it doesn't, it can be frustrating to wait for the credits to roll, only to find that the date appears as a row of Roman numerals which often flash by too quickly to convert them into Arabic ("ordinary") numerals.
The BBC is the main culprit, which is even more annoying as it's funded by tax payers through the TV licence. I know most of the Roman numerals, so I'm not completely phased by them, but they make things overly complicated and I think the use of them by a public service provider is somewhat archane in 21st century. In the early days of the BBC, most of its presenters and hierachy were products of the public school system, and had the benefit of a classical education, so their attitude may have been "well, anyone who's had a decent classical/public school education will understand them, and we're not bothered about the rest". Or maybe they just thought Roman numerals looked more elegant? Either way, I wish they'd switch over to "ordinary" Arabic numerals - AIBU?