After upgrading to the latest version of TortoiseSVN (1.5.2.13595), it\'s context menu is no longer available.
When attempting to run it manually, I get this error:
I remembered I'd seen this thing before just after posting to SO
It seems that later versions of TortoiseSVN are built with Visual Studio 2008 SP1 (hence the 9.0.30411.0 build number)
Installing the VC2008 SP1 Redistributable fixes it