Error 404 is shown in case there is / or \ in search query

Precondition
create several topics satisfy your search request (with "code" text in the topic title/post for my example)

Test Scenario

1. Go to jcommune, enter search query with / (for ex. /code)
2. Click on the page 2

As a result, error 404 is shown

please, see the url: http://uat.jtalks.org/code?page=2

Note: If you use \ in the first step, PageNotFound is shown