generic thunk code fails for method ...

[Igor Alekseev]

	Dear c++ experts,
could you help me in finding information about gcc error messages ?
I have a code which was successfully compiled with gcc 2.96 under
RedHat 7.0, but under RedHat 9.0 with gcc 3.2.3 it fails with the
message:

ServerHandler.cc:96: generic thunk code fails for method `virtual int
    ServerHandler::outputError(int, const char*, const char*, ...)' 
which uses
    `...'

Could you explain for me what this message means and what shell I do
with it ?
	Many thanks in advance, Igor Alekseev.