In a discussion with Bender after you've cured him (given him the Doc's 
antidote) the same conversation options keep appearing.

In the screenshot it is clear that I have cured him, as per the dialog; however 
the conversation options are still there. Even after leaving the conversation 
and coming back later they remain.

I think there should be some type of "if" statement in /dialogs/Bender.dialog 
on lines 105 and 112 that control the appearance of these options based on 
completion of the quest. However, I don't know C so I'm not going to even try 
to attempt writing a fix for this.

Dialogs are not C but Lua. It's rather simple to learn so perhaps you could try
fixing the issue?

At any rate, thanks for the report.

Hmm, I seem to be unable to reproduce this.

Can you give me the very order of the dialog options you clicked?

If it can't be reproduced we'll have to pretend it didn't happen. Please provide
recipe to reproduce.

Talk to Bender the first time (before he's Bender):
"Hello..."
"What's wrong?"
"What made you so sick?"
"Brain enlargement..."
"But if you aren't dumb..."
"Maybe taking the brain enlargement..."
"Isn't there some doctor in town..."
"Maybe I can help..."
"Where can I find this doctor?"
"See you later."

Doc Moore:
"Hello!"
"I'm MapEd"
"I'm a Linarian"
"Yes, I had to fight..."
"Doctor, how can I keep..."
"Can you fix me up?"
"What do you mean, self-inflicted?"
"What can you tell me about Bender?"
"Doc, I took some of those brain..."

At this point, when I return to Bender the conversation starts off as, "You 
took too many strength pills..." automatically from me (unprompted) and his 
reply being "Nah. The strength pills were fine," blahblahblah.

Hmm, I cannot reproduce this with instructions you gave, closing.