http://bugs.winehq.org/show_bug.cgi?id=10706
--- Comment #2 from J jc.gervais@videotron.ca 2007-12-11 14:55:37 --- WORKAROUND: Changing the 'Windows' type to 'Windows ME' in the 'Applications' tab of the winecfg program causes the program to function as expected. Thanks to Sylvain Petreolle for the tip.
Note, this may require you to re-install TortoiseCVS as it does not install the 'cvs95.exe' when its install program (running under Wine) detects the platform as Windows 2000 or greater.