I've been under the impression that conjunctive adverbs needn't be preceded by a full-ish stop (e.g., a period or semicolon). I don't know where I got that idea, and consequently, as a lover of grammar, I'm aggravated. That sentence I just wrote, for example, is what I'm talking about.
So, have I always been wrong to link two independent clauses—the latter of which begins with a conjunctive adverb—with a comma and a conjunction? I seem to recall having always written this way, yet as a graduate of the English department, I have not once been corrected.
If so, where does the comma go—before and after the adverb? only after? only before? With regard to the conjunction itself—before or not at all? And while we're at it, in the last sentence of that last paragraph, should there have been a comma after "yet"?