When using curly quotes in a content object we may be unable to search for it using eZ Publish's Search Engine. If we use a regular quote everything works just fine.

For example:
The "L’avertissement" string contains a curly quote (’).

Check the following link for more information about curly quotes:
http://www.typographyforlawyers.com/?page_id=1322

Steps to reproduce

Testing an object with a curly qoute:

1. Create an object with "L’avertissement" as title;
2. Search for "avertissement";

Nothing with be shown in the search results.

–

Now, testing an object with a regular qoute:

1. Create an object with "L'avertissement" as title;
2. Search for "avertissement";

Your object will show up in the search results.