I use Vienna as my RSS reader. I’m not sure if I changed some preference in DTPO, but whenever I open the RSS icon, Vienna opens up. About two or three seconds later, the DTPO icon starts its bounce, and viola, DTPO opens.
Before I call in for an exorcism…I thought I’d post here (those things are expensive!)
This came up recently with RSS under Mavericks – a similar situation where OS X changed the RSS default. I didn’t have time to search for the thread on the forum, but there were suggestions for changing the default RSS reader back to DEVONthink.