Global Site Search Bug

Hi,

There is a bug in the Global Site Search plugin that is making my website unusable. All my posts have in their title or content a slash sign (e.g. 1999/1) and the users of my website need to type the number along with the slash to search. However, it appears if there is a slash in the search query the link to the second or third page of the results becomes broken.

You can see an example here: (website is not in English, but the problem is easy to see)
http://qanoon.om/site-search/?phrase=1999%2F1

Click on the page 2, 3, or any other page to see the problem.

The problem will not happen if you do not have a "/" in the query. Example:
http://qanoon.om/site-search/1999+1/page/2/?phrase=1999%201

This problem does not happen if you use the default WordPress search.
http://qanoon.om/page/2/?s=1999%2F1

This is a major problem for the users of my website, I hope that you can help me find a solution.