Thank you very much for the results so far.

• Indeed, I have to find out why Chrome adds this completely useless scrollbar and how I can avoid it.
• The alert() popup is simply a replacement for "I have no idea". What could be really useful if somebody clicks on a pin?
• The stop button is actually a kind of emergency button for the case that you have a bad internet connection and it takes too long time to load hundreds of links. The purpose of the stop button is to give up waiting. That's why there is actually no need to continue. But anyway - I can add a continue button, perhaps it might be useful.
• Yes, the checkboxes hide pins. There are articles which contain the same coordinates for two or more different subjects, then you can remove pins until only one is left. But this is something I have to think about.
• A reset button is a nice idea, thank you very much!

Indeed, this ticket came as a surprise because I migrated already some time ago. I am glad that this task is already resolved, so I don't need to find out what was ongoing.

I am sorry, I am currently sailing on the Russian ship SHTANDART, have internet only from time to time, and I have all access infos to Wikimedia at home. Due to Corona virus, I have no idea when I am back home, so currently I can do nothing.

Indeed, IMHO it was not a bug, it was a feature. The reason was an e-mail about a security vulnerability mentioned in T219178 (which I can not read) and I found it a good idea to let my program accept only original links from wikipedia. Well - I did not know that my program is also used from Commons, but nice to hear this :)

Funny... I see no reason for this. Anyway, my program checks whether a name ends with this arrow, and if so, it deletes the arrow.

Hi Dvorapa,

Thanks Dvorapa, now it looks OK.

I can not see any mistake in my program. Anyway, if my program calls kmlexport with "section" as first parameter, the problem with &sect is avoided.

This must be new. And it should not work without a semicolon. Anyway, my program worked all the years with "&section=..."

First a big THANKYOU for this long description!!!

And by the way: if this problem can not be solved in a short time, I would like my program to produce a message "sorry, temporary out of service" instead of this ugly error message.

OK. Now I turned (hopefully) all my last changes into comments, and my program should work as before. Can somebody restart the service?

I made some changes until Apr 4 22:17 (the currect date of the file "wiki-osm.pl").
Can somebody tell me whether the mentioned problems occurred after my changes or already earlier?