Steps to reproduce:
Page includes search entry box:
<input type=text placeholder='Saecrh…' autofocus />
<input type=text placeholder='Search…' autofocus />
Though technically it's a filter rather than search, but Search is probably more widely understood.
This already has been fixed in https://bitbucket.org/opencast-community/matterhorn/pull-requests/1403/fix-search-box-placeholder/diff. Since there was no issue related to that PR, I set this one to "Fixed and reviewed"