Advanced Search Problem

Hi, I am using the newest version of zen cart and have just noticed a problem with advanced search. Maybe someone can point me in the right direction?

I only get the problem when using quotation for an exact search:

index.php?main_page=advanced_search_result&search_in_stock_items=1&search_in_des cription=1&keyword="tag+heuer"

That works ok, but when I click to the next page of results the URL looks like this:

/advanced_search/search_in_stock_items/1?search_in_description=1&keyword=%26amp%3Bquot%3Btag+heuer%26amp%3Bquot%3B&inc_ subcat=0&sort=20a&page=2

And I get an error page say there are no results for the search phrase.

Any help will be appreciated. Thanks

EDIT: The actual new page url is: index.php?main_page=advanced_search_result&search_in_stock_items=1&search_in_des cription=1&keyword=%26quot%3Btag%20heuer%26quot%3B&inc_subcat=0&sort=20a&page=2
It changes in the search bar once the page loads - the problem here is the %26quot%3B instead of " and %20 instead of + etc...

When I roll over the next button, I see this in the browser tool bar:

index.php?main_page=advanced_search_result&search_in_description=1&search_in_sto ck_items=1&keyword="search phrase"&inc_subcat=0&sort=20a&page=1

Which actually works if typed in, but when I click the link it turns it into this which doesn't work:

index.php?main_page=advanced_search_result&search_in_description=1&search_in_sto ck_items=1&keyword=%26quot%3Bsearch%20phrase%26quot%3B&inc_subcat=0&sort=20a&pag e=1

Same thing happens in other browsers.

" is turning into " which is turning into %26quot%3B

I have tried removing recently installed add-ons, but the problem still persists. Please does anyone have any idea why this might be happening?

Sorry, I don't seem to be able to edit my posts anymore.

Just wanted to post that I found a way around this. I'm sure it's not ideal, but I can't find anything else.

In advanced_search_result/header_php.php I have changed:

$_GET['keyword'] = zen_output_string_search($_GET['keyword']);

to:

$_GET['keyword'] = $_GET['keyword'];

And it is now possible to view more than one page of search results that use quotation marks.