Here are listed some quick fixes for AjaxSearch 1.8.3a bugs
AJAXSEARCH-38 - body>> in Search Highlighting
AJAXSEARCH-39 - Call to undefined method DocumentParser::getRecordCount()
AJAXSEARCH-41 - Weird behavior versus dollar sign followed by 2 digits / \$\d{2} /
AJAXSEARCH-44 - Parents with a container that doesn’t contains any child documents
AJAXSEARCH-46 - Injection of content when javascript is desactivate
AJAXSEARCH-47 - Filter not working when parents or documents not initialized
[EDIT]: all these fixes have been integrated in the version 1.8.4 which is the version provided MODx EVO 1.0.1