The Experience Add On for WordPress and Professional or higher level of service for MySLP has a feature that will display a starting image, your company logo or a static map image for example, until a user enters and address and performs a location search.
This feature was not working correctly on most of the styles in our Style Gallery. Earlier today the Style Gallery was updated to properly manage the CSS that works with this feature.
To re-download the style go to Store Locator Plus (Advanced Options for MySLP users) | Settings | View and select a different style than you are using now. Then re-select the style you are using to force a download of the latest settings and CSS styles.
Note: if you have modified ANY of the layout settings you will want to save those changes by copying them to a separate application such as a code editor or local text editor first so you can re-apply the changes if you re-download the style from our Style Gallery server.