does add/remove attribute not work?

I tried searching, but I'm getting irrelevant results, and the bug tracker got 0 results for "attribute"

does the add/remove attribute action in system function at all?

if so, why doesn't this work:

http://dl.dropbox.com/u/1013446/att.cap

No doesn't work for me.

Tried adding the solid attribute and then removing it and it still didn't make any difference to the sprite. Using latest unstable build.

I've yet to figure out what it does. Add/Remove sounds as if it should add or remove a custom attribute, but it doesn't seem to be aimed at that. It seems to be aimed at setting/clearing an existing attribute, but it does not work for me, either.

Both of the above should be implemented, but the latter would be necessary to make the former useful.

It seems to only be able add an attribute. When you try to remove one it does nothing.

davo says it does not and will not work

because changing attributes can crash the runtime