My htaccess RewriteRule works on localhost/mysite but not at mysite.com on a 1&1 shared host

Question

Solved:

unfortunately, the solution is not a satisfying one. This morning, when trying @Wige\'s Suggestion, I found, to my suprise, that the Expected value

Answer 1

Seems to be connected to 1&1's hosting environment.

See this question, in particular, this answer.

Basically it appears that 1&1 enable "MultiViews". By adding

Options -MultiViews

You disable that setting for your website and according to various reports, this resolves the issue.