I noticed this a couple of days ago when I tried to download something from and Apple ftp server. I thought it was a fluke so I ignored it. Today I tried to download the daily bits from sweetlou and got the same result. Go to the above link and select "Download MacsBug 6.6.3". After a brief pause you should see an alert stating: /developer/Tool_Chest/Testing_-_Debugging/Debuggers_-_dcmds/MacsBug_6.6.3.sit.hqx: Not a directory. Following the same steps in 4.x downloads the file.
*** This bug has been marked as a duplicate of 96418 ***
Agreed. most definatly a dup
(if i could spell definitely right. oops!)