Hi,
try to add this CSS code at your template:
div.jsn_search .input-prepend > input, div.jsn_search_module .input-prepend > input, #member-profile .input-prepend > input, #member-registration .input-prepend > input, #filters .input-prepend > input{margin-top:0px;font-size: 14px;}
div.jsn_search .input-prepend > .btn, div.jsn_search_module .input-prepend > .btn, #member-profile .input-prepend > .btn, #member-registration .input-prepend > .btn, #filters .input-prepend > .btn{font-size:14px;}
div.jsn_search .input-prepend, div.jsn_search_module .input-prepend, #member-profile .input-prepend, #member-registration .input-prepend, #filters .input-prepend{display:table !important}