Some non-ASCII letters in tags cause deletion of converted files.
Source is an uncompressed .wav file, with cached metadata:
ARTIST=Anúna
TITLE=Maria Matrem Virginem (Maria Virgin Mother)
Target name is %artist%-%title%. LAME 3.97b1 from rarewares was used. Parameters used were -V 4 - %d. lame.exe was in C:\Program Files\foobar2000\cli\, and the full path is mentioned in the converting preset.
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With tagging turned back on:
When Convert to same directory is used and converting starts, the target filename is not Anúna-Maria Matrem Virginem (Maria Virgin Mother).mp3, but Anuna-Maria Matrem Virginem (Maria Virgin Mother).mp3. When the converting finishes, the file disappears.
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I see this with 'í' and 'Á' as well.
edit: foobar2000 0.9 beta 8.
Workaround: $ansi(%artist%-%title%)