Hello,
I don't know why you changed some missing addresses in Vienna, Austria but
you changed them for bad and also Yahoo Maps have these flaws.

First Arbeitergasse 7, 1050 Wien, Austria http://y.ahoo.it/ZpJr1YZv
This address should be near this address http://y.ahoo.it/9KUqCw8M
Navteq finds only Arbeitergasse 9, 1050 Wien.
Second Missindorfstrasse 21, 1140 Wien, Austria http://y.ahoo.it/FuqkDnXt
This address should be near this address http://y.ahoo.it/pO8SWLth
Navteq finds only Missindorfstrasse 20, 1140 Wien.

There is an Open Data Map of Vienna in WMTS format, http://data.wien.gv.at/katalog/stadtplan-grundkarte.html and a labelling WMTS layer, http://data.wien.gv.at/katalog/beschriftung.html Please use them to add missing addresses.

Please fix these flaws. Thank you in Advance for your help.