- create empty document in any application, f.e. calc
- choose menu file/save and select a non current filter, f.e. excel .xls
- press save button
- dialog pops up, asking to "keep current format" or "save in odf format",
select "save in odf format"

now we are back at the save dialog and the file name edit box contains a file
url, not the previous file name. Press save now and and error message pops up,
stating that the given file url is invalid.

Don't know if this is a regression but for me thats a show stopper