Recently active problems in PBwiki tagged with wiki

I've uploaded images for my wiki. After uploading, pbwiki offers an option to rename images, which I have done. However, when editing a wiki page in classic mode, the renamed images now appear as broken image links in the "Hints" section.

Is there any way to refresh the hints section so it shows the newly-named images?

Are tags in languages other than english supported by pbwiki?

I have problems with tags written in greek. Is international tag support a known issue?

Thank you.