Some files from private repository https://bitbucket.org/pakre/text/ can't be accessed using web interface and 404 error message is shown instead. There is no problem with normal access using mercurial client, though.
This is one of affected files: https://bitbucket.org/pakre/text/src/cff0f5fecaf0/P%C5%99ehled%20literatury1.doc. The file was pushed from windows machine.
It may be related to the fact, that the filename contains diacritic characters and thus related to encoding of the filename. But my quick testing with files with similar name was unable to verify this clam, some files are accesible and others not, see https://bitbucket.org/marbu/jupiter/src.