Thanks for the quick reply!

I tried this out, but it seems not to work, at least not in my case

D:\dev\perl>perl -e "mkdir('test');"
D:\dev\perl>attrib test
           D:\dev\perl\dirtreeByTag\test
[download]

DOS attrib shows no +R (the flag for read-only) - but the Windows property Dialog shows "semi-checked" checkbox for write protection (meaning the background of the box is gray, but it is checked)

I Think this must mean that there are differences between the DOS-available attributes and the ones windows sets...

I will look further with this information and let you know if I find something.

In the mean time I'm looking forward for any other answers, as everybody here does always ;-)