Here are a few of my pet peeves among language errors:
" ...between ten to 15 minutes..."

"up to 50% -- and more!"

Yuppies using "i.e." (usually pronounces, "aieeee") when they really mean "e.g.," because they don't know what either term means and are too pretentious to say "for example," or "such as." E.g., I've seen potluck announcements that say something like, "Bring a dessert, i.e. cookies." (What? No pies allowed?)

Yeah, DMcG, someone might earn 110% of my income, and I might spend 110% of my income (by borrowing), but you can't give more than 100% of yourself to a job, relationship, etc. You can't keep your eyes on the road 110% of the time!

AllanC., a friend threatened to "revoke my poetic license" because I complained about Woody Guthrie's having written "...laid it on to she and me..." and about that type of grammatical error in many country/western and popular songs.

[BTW, Allan, did you work for a groinecologist?]

Banjer, have you seen the hardware stores that advertise "duck tape?"

When did people start saying "purposely" instead of "purposefully? We don't say "aimly" or "thoughtly" or "prayerly" or "hopely."

Then there's "normalcy." DON'T GET ME STARTED...
As I understand it, Warren G. Harding invented that word back in the early 1920's (we needed to "return to normalcy" after WWI), and the press at the time kidded him (saying, "You sound just like Dubya!").

I did not hear the word a lot until about the time GWB took office (although I heard it a few times in the late 1990's). But in the last few weeks, it's "normalcy" all over the place. Are we going to start saying "formalcy," moralcy," "realcy," "validcy," etc.?

How about "jive" instead of "jibe."

Speaking of funny things we often say, the brilliant Steve Allen used to say "Needless to say..." and leave it at that!

Pavane, I'll accept "phenomenons," and "arenas," and "forums," but I gag when I hear about "a phenomena."

Dicho, I, too think there are places where the vernacular should be colorful. And language does evolve. I am not going to say, "Woe is I," or sing "I've Got To Be I." Nor do I think blues would sound right without using phrases like "I ain't had not lovin'." But since songs are no longer expected to rhyme, if a language error is NOT a regionalism or dialect and does not enhance the poetry, I find it really irritating when bad grammar shows up in songs just because of ignorance. [E.g., there's a c/w song that says, "...till death do we part..." and another that says something about giving thanks "to he who made the stars." It's like chalk on the blackboard to me!

Genie