How to reproduce it :

• I have some threads that talking about "copil",
• I enter in the search field the "Copil" keyword
  > the list of thread that is displayed only talk about "copil"
• without quit the field, I delete the keyword (using the delete button on the right) and then I click on the thread that is under the form.
  > nothing occurs. The complete list of thread is not displayed again and I cannot get again the complete list of threads without refreshing the whole page