Bizarre OS3.9 problem with Ed

[golem]

I have had this problem with two installs now I think;
When you Ed a file it sets the protection bits on that file to just read. Therefore when you come to save it it can't and you have to change the bits to rwed again. Very annoying and I can't for the life of me figure out why. I've checked the protection bits on the Ed executable itself and it is prwed. Ed-startup in S: is rwed.
Why oh why?...anybody had the same?

[golem]

Filesystem is 45.13 (3.8.2001). Tried it without an Ed-startup. Same. Ed version is 37.11 which is what comes with the CD I think. Tried same version of Ed on my WinUAE install which is vanilla OS3.9 and not a copy of my main system and it works fine. Strange. Whoever said computers are logical )