SVN command line client: checkout refused when LDAP password changed “svn: OPTIONS of” (repo) “authorization failed” (but works in TortoiseSVN)

Question

When using the command line/terminal svn client, a colleague is getting "svn: OPTIONS of " [repo] "...authorization failed" error message when they attempt to checkout the repo to be their local working copy.

They used to be able to do this but have recently had to change their password (periodic routine security policy). And it stopped working. NOTE: The svn check command does ask for a password everytime (which they supply - i.e. their new one.)

BUT strangely they have no problem with Tortoise SVN, it works on that. They supply their usual login and new password and it works.

Our setup is a virtualised CentOS Linux machine with several Linux user accounts where development takes place and the SVN central repo is on a separate server, authentication is using our LDAP login (i.e. the same corporate login used to login to our Windows machines). We login as Linux users to our development server from our Windows machines, using standard terminal SSH tools, e.g. PuTTY or MobaXTerm or CygWin.

When I change my password I don't get the same problem, I am able to checkout.

I have seen many questions about this error message from searching various forums on google but none have provided me with a solution as yet.

One of the solutions I found suggests to clear or remove a local cache containing authentication, in a .subversion folder, we tried this but still the same problem. Also tried checking out to another folder.

So it seems we have clean out any trace of cached passwords but yet it still rejects.

Could there be another place on our CentOS Linux machine that caches the login What is meant by OPTIONS (could it be a setting somewhere on our development machine or on the SVN repo server?) Could it be a HTTP Proxy cache of my colleague's credentials stored somewhere - so we need to clear that when a password is changed?

(Mistakenly posted on superuser.com (which is about users), so closed it there and moved it here)