[ladylib]

I believe she is grammatically correct. "None" is singular, so it takes a singular verb. "Of these charges" is a preprositional phrase and is not considered. At least that's what I learned.

[madfly]

Try these, I think "None" is plural.

None of these charges is true
One of these charges is true

Some of these charges is true

One was able to vote

None were able to vote

[SLM]

From the Harbrace College Handbook, p. 71:

"Subjects such as...'none'...may take a singular or a plural verb; the context generally determines the choice of the verb form."

[Jagdgewehr]

None are...

None is...

I've always considered "none" as pluarl for some reason. "None are..." sounds better to me, though. My English professor in college always told me that "when in doubt, say it out." However, I would rather be right than sound right.

Anyway, thanks for the correction, ladylib.