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I am having a problem. I am trying to work through the PDF of Dave Thomas''s book, but I keep getting this error after developing for five to ten minutes: WARNING: You have a nil object when you probably didn''t expect it! Odds are you want an instance of Array instead. Look in the callstack to see where you''re working with an object that could be nil. Investigate

I am developing an application in German. This means I have umlauts. When I was using rails version 0.13.1 there seemed to be no further configuration needed for umlauts to be shown correctly. Now I have upgraded to 0.14.2 and the umlauts are being displayed at ''?''s. I changed the encoding of the page and it is UTF-8. I have also tried the steps listed at