I have the same problem. First the download link was wrong, they had forgotten the .html on the webadress and now I get the same exact error message here - have someone forgotten to change something in that file "ra.c"? I'm trying a previous version, perhaps it was compiled when sober... ;-)
I was installing on Windows XP Home, I've had TortoiseSVN installed before I had to swap harddrives and reinstall everything from scratch, an earlier version ofcourse, and it has always worked perfectly for several years. That row " 'D:\Development\SVN\Releases\TortoiseSVN-1.8.0\ext\subversion\subversion\libsvn_client\ra.c'" Where does that come from, is it the place where I'm fetching, some adress that the compiler-person has when making the current release? It's not a fileadress on my computer at least. I was trying to check out: "http://svn2.xp-dev.com/svn/1541UltimateII/trunk" But it seems someone compiling this version messed up, right?