“Unable to obtain display variable” for X11 (OS X Leopard)
Another one in case anyone out there is searching the Internet to fix the same problem.
I was trying to load an X11 app on Leopard (IDL) which used to work in Tiger, but getting the error message above.
It turns out that moving X11 out of /Applications/Utilities (into /Applications, say) will fix it.
Why I hate Google (volume 27)

“This is a beautiful Cathedral in very good condition”???!!!?!!1111eleven!1
For goodness’ sake! It’s an 8th century foundation with some of the most breathtaking architecture in the west. It has a stunning Henry Willis organ, the Mappa Mundi, and a beautiful situation on the River Wye.
And what does Google pick out to tell us as the single most important fact about this wonder? Some witless user-contributed review that the cathedral is “in very good condition”.
I mean, what is this – eBay? “Super R@RE! Item sustained some damage in 1786 when the west tower collapsed but has been fully repaired by authorised professionals. Would make a fine adornment to any city riverbank or a large mantelpiece. Price does not include postage, COLLECTION ONLY!! Would prefer paypal. Check out my feedback!!!!!!”
At least Hereford gets off quite lightly. If you use an iPhone to Google for Worcester Cathedral, the annoying map-listing (right at the top again) is for “Worcester Cathedral (opp.)”. I kid you not. Founded in 680 AD, an inspiration to Elgar amongst others, with an organ that’s just undergone a £5m restoration – and the world’s biggest search engine relegates it to a bus stop.
obWaterways: London Bridge is even better.
obOSM: and unlike Google, OpenStreetMap does actually mark Hereford Cathedral.