The documentation says that the source attribute for the ant task can contain multiple entries separated by the File.pathSeparator character. Unfortunately, if you have multiple entries separated by your platform separator character, tattletale exits without processing any of the paths.
It appears that the problem is in file: org.jboss.tattletale.Main, on line 588 in the execute method...
588 | StringTokenizer st = new StringTokenizer(source, "#");
It appears that the path is expected to be delimited by the '#' character regardless of platform. Assuming the documentation is correct and that the code is wrong, the following fix is needed.
588 | StringTokenizer st = new StringTokenizer(source, File.pathSeparator);