Both packages depend on tinyxml, but conflicting tinyxml use flag stl. filezilla needs tinyxml[-stl] and libmediainfo needs tinyxml[stl].
Created attachment 286769 [details, diff] filezilla-3.5.1.patch One method of fixing the conflict.
It would be a great thing if this patch would be included by default in the ebuild. Every time I sync I have to apply the patch! F.
I was thinking about adding a stl USE-flag to filezilla, but it did not have any real benefits and filezilla behaves fine after some days of testing. So 3.5.1 is fixed in tree, now using tinyxml[stl]. Thanks everyone for the report and suggestions! I've also switched tinyxml to +stl default, as the only packages depending on it ask for +stl (filezilla, vdr-audiorecorder and libmediainfo)