[Xymon] Xymon 4.3.4 working great except for the info column

I recently did a fresh install of Xymon 4.3.4 and everything is working well with the exception of the info column. When I select this, I get an Internal Server error. The URL is like this: http://server/xymon-cgi/svcstatus.sh?HOST=test1.test.com&SERVICE=info

Apache's error_log says: Premature end of script headers: svcstatus.sh

If I change the URL to display one of the other columns, say trends for example it works fine: http://server/xymon-cgi/svcstatus.sh?HOST=test1.test.com&SERVICE=trends

Where should I begin looking for this issue? It seems to happen for every host being monitored, but only for the info column.

Thanks,

Nathan Riley