Ok, I am trying to duplicate the problem. I am trying to compile CBTortoiseSVN plugin from trunk.
I am trying TortoiseSVN version 1.4.7 build 11792
I am trying CollabNet svn.exe version 1.4.6 (r28521)
Here's what showed up in Code::Blocks log; using Code::Blocks SVN 4852
CBTortoiseSVN: Filename: F:\SourceCode\Projects\IDEs\CodeBlocks\codeblocks\src\CodeBlocks.cbp, Filebased: 0, Projectbased: 1, Workspacebased: 0
CBTortoiseSVN: Executing: "tortoiseproc.exe" /command:update /path:"F:\SourceCode\Projects\IDEs\CodeBlocks\codeblocks\src" /notempfile
Tim S