Have you tried the Forum Search tool? If you search for the word "spinning" or "circles" with the word "cory" in this this forum, here are the results you obtain:

http://www.planetcatfish.com/forum/search.php?keywords=spinning+cory&fid%5B0%5D=6
and
http://www.planetcatfish.com/forum/search.php ...

For about a week one of my 4 corys has been suffering a bit of buoyancy issues. It's not consistent and he rests ok majority of the time but every now ... he is struggling to stay upright because he is hypoxic; and, he is spinning about the tank because he is trying to breathe.
If he has been like ...

The spinning is IME an indication of the health being at a point that is very seldom recoverable

Not quite sure what that may be, but generally "swimming problems" indicate either nerve or "mechanical" problems. In this case, I'd exect it to be "mechanical". Quite often, this is in turn from some form of swelling type problems with internal organs - most common cause is an internal infection ...

Hi All,
I recently picked up 7 Cory Melini along with about 20 Cory Hasbrosus. I placeboth in a quarentine tank, 20 gal long, pH 6.0 -6.5, 3-4 gH & 3-5 ... around listlessly, then floating to bottom, lying on their sides. Or spinning/spiraling also. I've lost one already and just hope there is some thing ...

... s been staying on the bottom and falling over on her side or back and spinning around almost like she's having seizures. It also looks like her right ... any, but here's a video. The 1st part is from last night and the 2nd is this morning.

http://cmsu2.cmsu.edu/~tmg68650/coryseizures.mpg (2.3M)

-Chelle

... are all in acceptable ranges. I did not know what to do for the poor cory so I put it down (I hate killing anything :(). It was clearly suffering ... ich, or whatnot. A few days later it died. It never did exhibit the spinning/rolling as the other did. Now my small albino cory is gasphing HEAVILY ...