I'm the guy who posted about the "major floater attack" about a month
ago.

I saw my optometrist yesterday, and he dilated my eyes and looked at
them through a microscope.  He said he saw nothing unusual or of cause
for concern.  I even showed him a picture I had drawn of some of my
bothersome floaters from a month past, and he said they didn't look too
unusual.  He also said that the vitreous in my eyes may have more
liquid than those of other people, which may have caused the
"twitching" motion of the "legs" on the floaters I had seen.

However, he did say that such "closed-eye" floaters (as opposed to the
ones people see with their eyes open) are usually dim and shouldn't be
as vivid as they had been that one night.  I told him (as I had on the
phone earlier) that I had been working long hours that night and hadn't
slept in a long time, and consequently I had been drinking a lot of
coffee.  He said that this could have caused a blood fluctuation in the
visual part of my brain, making my floaters much more noticeable.

So, my "new" floaters weren't really new at all -- just temporarily
more visible than before.

Anyway, thanks to everyone who gave me advice beforehand.  Just letting
you all know my eyes aren't in any serious danger.