Server versions are different to the client versions (e.g. server could be using linux or windowsx or ettv binaries which uses different version numbering again).
You have to install the 2.60 patch before applying 2.60b, not doing so will leave you without the official pk3 files that were included in 2.60.
but yeah if issues persist, uninstall and re-install using the ultimate installer.
Posted on Tuesday, 12th July 2011