When updating from subversion repository using tortoise svn client I get error looking like that:
Could not read chunk size: An existing connection was forci
I was getting this same error message on updates after I renamed a folder and committed. I created a new working directory and didn't receive the error. So, I just moved my changes to the new working directory, committed and blew away the old directory.
So, this error seemed to be caused by my local directory getting corrupted.