Originally Posted by mjt57
Oh, when I was reading the documents one of them has random question marks inserted in mid sentence. eg:
This is a sample?sentence with a question?mark in it.
Can Calibre's converted remove these?
That is most likely you chose of a wrong page encoding when the document did not declare one (or declared the wrong one). Those are probably 'curly quotes' There is hints to choosing in the ballon help for the 'encoding' option in the convert properties.