Hi Othmar (and others in the Forum)!!
I came across a problem. The problem appears when you select your report mode to "WUHU Software" in the "Community -> Change userdata" section.
Everything is working great until you go to "Community -> Report Your Weather" section.
I came across these two error messages:
Warning: main(eingabe_opt2.inc): failed to open stream: No such file or directory in /www/wetter.kremstal.at/awekas/en/eingabe.php on line 53
Warning: main(): Failed opening 'eingabe_opt2.inc' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /www/wetter.kremstal.at/awekas/en/eingabe.php on line 53
Right after those messages, you can give every detail of the weather conditions you have, despite WUHU sending the data, similar to the "manual input" Report Mode.
Filling up this form and clicking "Submit" effectively kills all updates from WUHU and the map is stuck with the manual update time forever (or until you change the "Report Mode" to something else that will give an update, then you can change it back. Just remember not to make any updates manually.