It has a bug that keeps dumping errors to the logs. There is a patch, but the patch removes the distance field. The module isn't maintained.
Does anyone know of other modules that can be used with OpenLayers and views to plot locations within a particular radius?
Use the geofield module 2.x. It contains proximity capabilities
Here is a link to instructions on Drupal.org for creating proximity search using Open Layers.
It's fallen a little behind updates to the process, but I'm going to try and update it very soon.