Leaking capacitor?

[JoeG]

Being a newbie in electronics, I've never encountered a leaking capacitor. Attached are some photos of a floppy drive interface cable for a CompuAdd laptop that I acquired several months ago. The cable has a capacitor attached to some of the pins on the cable connector.

The floppy drive has never worked. I checked it before, and thought that the "white stuff" under the capacitor was a glue to hold it down to the housing for the cable connector. Since then, I've acquired a replacement floppy drive for the unit. I started the process of replacing the drive today and encountered the capacitor and stopped.

But now that I've learned a little more than when I first looked at the capacitor, it looks like it leaked to me. Being that I've never seen one up close, I don't know. So I pulled the capacitor away from the "white stuff" to see if I could see a burst in the capacitor.

A few questions:
1) Does it look like glue, or a leaky capacitor to you?
2) Is there a test I can perform to see if it is in fact a leaky capacitor such as using white vinegar or a baking soda mix (not both since that will cause a reaction on its own) to see if there's a chemical reaction?

Thank you

Joe