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> You might want to tell us what SSL backend you are using and what version.
> Does the problem occur only when you perform HTTPS transfers, or does it
> occur when performing unencrypted HTTP transfers as well?

I need only HTTPS connections and OpenSSL 0.9.8a is used I believe. It
seems that the problem affects only in a big legacy Win32 server
application that has evolved for several years , was created with VC6,
it is compiled with VC 7.1 and still contains some MFC parts and a lot
of other stuff. The idea is to switch to cURL for HTTPS.

-- 
The fish that is singing in Ucayaly river...