As always there is something wrong that requires an immediate correction!
It turns out the data passed from the internet is a little bit different when coming from a Linux server or from a Windows server, which is my local test environment (even though the source code is the same) This has caused some processing error.
Version 4.1 has this now corrected. There are no other changes.
It is available for download here
http://webrailroader.com/ctc/download-page/