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:
The application has failed to start because its side-by-side configuration is incorrect.
Please see the application event log for more detail
The application log shows this
Activation context generation failed for "C:\Program Files\TortoiseSVN\bin\TortoiseSVN.dll".
Dependent Assembly Microsoft.VC90.CRT,processorArchitecture="x86",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="9.0.30411.0" could not be found.
Please use sxstrace.exe for detailed diagnosis.