MOTM

Hi everybody, I just finished building a MOTM 440 filter but am having
some problems with it.  I bought some polystyrene caps from a surplus
place that didn't have any voltage rating on them like pauls does on
his polystyrene caps (I also have a MOTM 440 built by him, loved it so
much I needed another!).  After powering it up and trying to use it
there was no sound only what sounded like a quiet bleed through of the
oscillator hooked up to it which the none of the controls had any
effect on.  I took it back to the bench and started trouble shooting
and what I found was that some of the polystyrene caps were melted, I
assume because they had too low a voltage rating (they are smaller
than Pauls).  

What I want to know is if this could have damaged any of the ICs?  I'm
gonna see if I can find some more polystyrene caps with a higher
voltage rating but I'd be surprised if the place has them :(

Thanks a lot for any help :)

Dave