I finally, after almost a year, disabled the cron job and my map is working fine. I autoapprove the locations, but you have to be a member to plot your location.
Member maps at the Ministry of Rum
Here's an excerpt of my markers.xml file
PHP Code:
<markers>
<marker mapid="94" title_map="fon_eti_que" lng="28.1105327606" lat="43.3604081168" userid="2061" username="fon_eti_que" text_map="fon_eti_que" type="darkred" pimage="http://ministryofrum.com/forums/images/googlemapme/noimage.png" />
<marker mapid="96" title_map="BlueHeronBrands" lng="-78.2262659073" lat="45.7243767341" userid="2154" username="Moose" text_map="BlueHeronBrands" type="darkred" pimage="http://ministryofrum.com/forums/images/googlemapme/noimage.png" />
<marker mapid="97" title_map="Joe's place" lng="-88.45644334" lat="47.9970626797" userid="2218" username="Joe\'s place" text_map="Joe\'s place" type="darkred" pimage="http://ministryofrum.com/forums/images/googlemapme/noimage.png" />
</markers>
Hope this helps someone.