Welcome aboard
Of course, some here understand english ..... how would one survive in an industry, which is mostly speaking that language without at least understanding it .....
To your problem, I have not seen that happen either. But you probabily have a problem with some of your local system-database, that is bookmark.nsf, desktop.ndk or cache.ndk. So apply the standard procedure to them: delete cache.ndk, when notes is closed, compress the workspace, save bookmark.nsf away and let notes create a fresh one .......
PS: well, now you have to use babelfish to translate from english to german, so that you will be able to use your standard-procedure to read the forum .......