Cannot Download/Open files with special characters in the filename

The title says it all. I have several files which include diacritical marks (àáüïè·ó...), and I am unable to open them from recoll-webui (Error code: ERR_FILE_NOT_FOUND). They work fine in the standard Recoll interface.

Examples of filenames that cause that error are:

"Clozapina. Història i característiques.pdf"
"Resum projecte pràcticum.odt"
"futur a nivell col·lectiu.odt"

It seems to affect all kinds of file formats and extensions.

Tell me if you can't reproduce the error

(Recoll 1.19.3 in Debian 7. Index was just rebuilt from scratch)

PS: This is what appears in recoll-webui console

Traceback (most recent call last):
  File "/root/recoll-webui-master/bottle.py", line 744, in _handle
    return route.call(**args)
  File "/root/recoll-webui-master/bottle.py", line 1479, in wrapper
    rv = callback(*a, **ka)
  File "/root/recoll-webui-master/webui.py", line 307, in edit
    'attachment; filename=%s' % os.path.basename(path)
  File "/root/recoll-webui-master/bottle.py", line 1692, in __setitem__
    def __setitem__(self, key, value): self.dict[_hkey(key)] = [str(value)]
UnicodeEncodeError: 'ascii' codec can't encode character u'\xb7' in position 39: ordinal not in range(128)
192.168.1.130 - - [15/Sep/2013 12:40:36] "GET /edit/46?sort=relevancyrating&before=&query=odt&after=&page=2&dir=%3Call%3E&ascending=0 HTTP/1.1" 500 1800

koniu / recoll-webui

Cannot Download/Open files with special characters in the filename #16