I was one of those once. Tried to get CVS in a project.
Then some other dev committed 9MB of tabs 0x09 at the end of a file. Then the site was "slow" (cause the homepage was 10MB). And the blame went to...CVS somehow.
CVS was notorious for doing "text/binary" conversions (CR/LF line endings to CR and vice versa), sometimes inappropriately. More than once, it resulted in files where every other line was empty. I can very well see this happening several times, resulting in exponential growth of whitespaces.
