TLS Bad record mac

When uploading to a Filezilla server version 0.933 using SSL/TLS the upload fails with the server reporting:

Data connection SSL warning: SSL3 alert write: fatal: bad record mac
(This message comes from the filezilla log)

Research shows that this problem has occurred with clients that are compiled with older tls libraries (perhaps this is the problem).

Some additional info. I am using version 4.2.3(build 494) under Wine in Ubuntu Intrepid. I had the same problem with my previous version (I think it was 4.2.2). All other functions seem ok.

Here is an extract from the winscp log file at the point of failure:

> 2009-10-09 11:58:01.483 STOR NUnit-2.5.0.9122.msi

< 2009-10-09 11:58:02.150 150 Connection accepted

. 2009-10-09 11:58:02.834 SSL connection established

< 2009-10-09 11:58:04.383 426 Connection closed; transfer aborted.

. 2009-10-09 11:58:04.383 Copying files to remote side failed.

* 2009-10-09 11:58:04.383 (ExtException) Copying files to remote side failed.

* 2009-10-09 11:58:04.383 Connection closed; transfer aborted.

. 2009-10-09 11:58:04.384 Asking user:

. 2009-10-09 11:58:04.384 Error transferring file 'C:\users\kim\Desktop\NUnit-2.5.0.9122.msi'. ("Copying files to remote side failed.","Connection closed; transfer aborted.")

* 2009-10-09 11:58:07.079 (EScpSkipFile) Error transferring file 'C:\users\kim\Desktop\NUnit-2.5.0.9122.msi'.

* 2009-10-09 11:58:07.079 Copying files to remote side failed.

* 2009-10-09 11:58:07.079 Connection closed; transfer aborted.

kimb wrote:

Research shows that this problem has occurred with clients that are compiled with older tls libraries (perhaps this is the problem).

What older tls libraries?

older libraries means what?
what does it contains?
what are available in new libraries that not in older one?