I did a build of MacPerl 5.6.1 for the first time in many moons today. A few small test things to fix.
One odd thing I noticed was that something that popped up in builds for MacPerl 5.8 that I never noticed before were popping up in MacPerl 5.6, with MacPerl trying to open "Test:Harness.pm" and seeing a file ":Test" trying to open it, instead. This causes havoc in the test suite, since there is a file called "TEST" (remember, case-insensitive!) in the t directory. So in my test script, I move the file around depending on whether the test needs that file or not.
Anyway, this never happened before with 5.6, that I recall. But there's not been a new GUSI in some time (since right before MacPerl 5.6.1r1 was released), and I would have noticed it before. Could something else have changed? I have no idea what, but I might look into it. I am fairly certain this is a bug in GUSI though, so hopefully Matthias will fix it and I won't need to worry about it anymore.