Members can edit others' messages in topics they created

[Pincopallino]

Greetings,
I am not sure whether this has already been addressed, I did a keyword search but could not find a relevant topic.
In SFM 2.0.5, if a user (not Admin, just a normal user) starts a topic, he has the right to edit not only his own messages, but also the replies by other members. This is obviously a problem. I browsed all the options in the settings but could not find an entry allowing this. I wonder if it is a bug or I missed a checkbox which should be unchecked.

[Kindred]

you have mis-set permissions.

http://wiki.simplemachines.org/smf/Permissions#Topics

[Pincopallino]

Checked now, the permission is denied.

[Burke ♞ Knight]

Have you went into the permissions for Regular Members and made sure that Modify someone else's post is unchecked?

[Kindred]

be clear...

is is DENIED or DISALLOWED?

they are two completely different settings and have very different results.

SMF permissions are, by default, inclusive.
If *ANY* membergroup that the user belongs to gives them a permission, then they have that permission, even if it is disallowed by other groups.

DENIED is a different setting and makes the permission denial exclusive (the permission is removed, regardless of any other group which may grant that permission)

by default, the ability to set a permission as denied is turned OFF

[Pincopallino]

I changed the permission to "denied", then logged in with an account without administrator rights, and I still can modify replies to a subject I had started.
I would post a screenshot of the permissions, but I am afraid it would not help much, the forum I am helping to maintain is in French 

[Irisado]

If it would be easier for you to resolve this issue in French, you could use the The French Support board.

[Pincopallino]

Never mind, I have activated the option to choose language, so here is the screenshot.

[Arantor]

And which group is that for and which profile is that set for?

[Pincopallino]

Regular members

[Arantor]

And which profile? Does that profile apply to the board you're looking at?

Are the users who are editing others' posts actually in the Regular Members group? Do they have another group instead like Moderator or similar?

[Pincopallino]

All boards permissions are set to "default". The users who can seem to violate the permissions do not belong to any other group. To be sure, I use a second account myself, and this account is only in "regular members". When logged in with this account, I am still able to modify replies to my topics, which is something in principle I am not allowed to do.
Is there any other screenshot I may post to be sure I am not missing anything?

[Arantor]

Have a look further down for 'modify own/any post' under the Posts heading.

[Pincopallino]

It was X, I changed it to D - see screenshot - but I still can modify replies to my own subject when logged in as regular member. 

[Arantor]

Then I'm sure there's something else going on. As an administrator look at your other account's profile and see what group is granting the permission...

[Illori]

check in the users profile that has the issue under show permissions and see what is going on and who has edit posts permissions given by what group.

[Pincopallino]

I think I have found the culprit. Members are "promoted" to new groups depending on the number of posts. In principle, these are "inherited" groups, so the permissions should have been the same. But for reason it was not the. Perhaps a misconfiguration when the "promotion" scheme was created. The system of permissions is quite complex, but I guess it is what gives flexibility.
Anyway, thank you for your help!