Windows 7 64 Bits, Eclipse Indigo, SlickSVN 1.6.17 all installed with path to the libraries entered in windows.
Why do I get the message JAVAHL (JNI) Not available and why does eclipse not load these libraries?
Have you tried installing SilkSVN as suggested on the subclipse official FAQ? Then on Eclipse/MyEclipse go to Window>Preferences>Team>SVN Change the client to SVNKit v1.XXX.
That did the trick for me.