mod_fcgid problems w/ IE?

I have a RoR application running under Apache2 w/ mod_fcgid

Whenever I submit a large number of database updates asynchronously
from IE, I notice that 10-12 fcgi processes (dispatch.fcgi) are
spawned.
Eventually the server issues a "Rails application failed to start
properly"
error and sends it back to the browser (which is expecting XML).
I'm guessing that it's wanting to spawn another fcgi process and
cannot.

When I run exactly the same operation in firefox (from a unix box or
PC)
only 2 or 3 fcgi processes are spawned and the operation completes
without error.

Does anyone know what's going on?

Thanks,
Peter