I need work advice

[game blouses]

I had a review with my manager with some negative feedback about my writing. My writing has never, ever been discussed negatively at work before, and I was floored. He said that I was making some mistakes and that I needed to improve. I asked for some examples; he didn't have any, and couldn't think of any, but said that as long as I improved it was fine. I said okay, can you email me some examples of things I need to fix? He said sure. 24 hours later I have nothing. 

Should I:

A. Wait until he sends me examples (which could be days, if ever)
B. Just keep working the way I have been, which is apparently wrong
C. Bug him about it like a crazy person
D. Some other option that helps me avoid looking like I've been worrying about this all day

[lola]

I would ask to have my feedback included with my review in my HR file, and then write in my feedback that this was the first time my writing had been addressed and that I had not been provided samples/examples of errors even though I requested them, however I will be taking A, B, and C steps to ensure the best writing/grammar/spelling possible in the future.

[sunshineray]

So, he literally gave you no examples of mistakes you've made? If that's the case, I wouldn't change anything (what the hell would you change??) and wait until he sends you something concrete. I'd document the date somewhere, note that he told you he'd give you examples, and just keep doing what you're doing. I don't know that I'd ask again right away. Is it possible for you to send a sample of your work and ask him to do an actual critique of it?

ETA: I also agree with lola's advice. Make sure everything is documented.

[nsl]

I'd honestly go over the most recent things you've written with a fine-tooth comb (send them to someone you trust who has a good grasp of the elements of style if needed) to see if you can catch anything on your own. I'd also document your request for examples and his inability to produce any, just in case.

[margotmacomber]

I would email him reminding him that you have requested examples of what he wants you to improve on.  That way you have a paper trail and even if he doesn't respond, you will have the email to back you up on your next review.