The only one that continues to bug me is using “an” instead of “a” before a word that starts with a consonant sound. I especially dislike the phrase “an historic” (as in “it was an historic victory”) which has bafflingly been deemed acceptable. Unless you’re a cockney, it should be “a historic”. The rule is to use “an” if the word starts with a vowel sound, and “a” otherwise. IMO.
That’s how they get ye