TestLink

I upgraded to testlink 1.9.3 since I saw that issue 2757 had been resolved:
[TL API] API method "updateTestCase" not available
http://mantis.testlink.org/view.php?id=2757
.
However, when I try to use this method, I get the error:
xmlrpclib.Fault: <Fault -32601: 'server error. requested method tl.updateTestCase does not exist.'>

Does this method updateTestCase exist in 1.9.3?
Is there a way to create a new version of an existing testcase via the api?

let me know if you are able to read content of closed issues on mantis, please

Does anyone use this forum?
There never seems to be anyone online and there seem to be a lot of Spambot replies as recent entries.
I am trying to decide whether to recommend TestLink for our company and the effectiveness of a user forum is a significant requirement (or sample tutorials/videos)
Thanks
Simon

updateTestCase() i.e. test case specification is ready for TL 2.0