I use macabre but i do believe this is not theme specific but global.
Issue: top of sidebar is overlapping the header bar on the main page. (see image attached)
Solution: drop the sidebar down 3 carriage returns. (see after image and code)
I did attempt to change the css for sidebar but for some reason it had no effect on the position. So i was forced to use <br /> in the html file. If you can fix with CSS thats great.
Here is the image before the fix..
Here is the code i added
ow_system_plugins/base/views/components/sidebar.html
{script}{literal}
DND_InterfaceFix.fix('.ow_sidebar');
{/literal}{/script}
<!-- added returns to push the sidebar down -->
<br />
<br />
<br />
{foreach from=$componentList item="component"}
{sb_component uniqName=$component.uniqName}
{/foreach}
here is the image after the fix
Thanks