Vitor,
Thanks for your reply. I do understand what you say and have searched that path. I cannot find where to check "escape single quote". It is the case for "spaces", "backslash", … but no "single quote". That is in the Script Filter workflow Alfred preferences window. Or, do I have to escape them myself ? I'll try that last thing.
Cheers
Hubert
Alfred v2.0.6 (203)
OSX 10.8.4
French locals, fr_FR