1. We will be officially supporting XF 1.5 after the final 1.5.0 release is made so there might be a couple issues like this.
2. Try downloading and installing UI.X once more. We had a packaging issue that we have uploaded a new version to resolve. Sorry about that.
3. Should actually be
Code:
<div class="primaryControls">
<!-- block: primaryControls -->
<i class="uix_icon uix_icon-search" onclick='{xen:if @uix_searchButton, '$("#QuickSearch form").submit()', '$("#QuickSearch .primaryControls input").focus()'}'></i>
<input type="search" name="keywords" value="" class="textCtrl" placeholder="{xen:phrase search}..." results="0" title="{xen:phrase enter_your_search_and_hit_enter}" id="QuickSearchQuery" />
<!-- end block: primaryControls -->
</div>
4. Related to issue #1 I think.
5. UI.X Navigation > Alternative Dropdown Menu Trigger
6. I'll take a look into this.