"I want to forget the little nuts" In the Ending animation sequence of Jintai, the song Yume no Naka no Watashi no Yume
(My Dream Within a Dream) plays with the following lyrics in romaji:


  Wasuretai tte kimochi
  Sore mo uso ja nai kokoro


On Anime Lyrics it is translated so: 


  The feeling of wanting to forget
  It, too, is an emotion that is not a lie


But in the subs I have, it is translated like this:


  What is it?
  There you sit on my lap, little squirrel
  The chestnut is like your flag, you child of the forest, seeking courage
  
  When the sounds of March are all around, even the humans will know
  
  Day in, day out, I sow the seeds for the future
  Eventually they bloom to flowers, and all feast on what it brought to fruit
  My dream fulfills that of the others at the same time
  Isn't it nice to make your wishes then?  
  
  I want to forget the little nuts
  That's what I really feel like
  
  What's wrong today?
  You wave your chestnut like a flag, little squirrel
  Soon you will run to the forest again, your refuge
  What's wrong today?
  Here you sit on my lap
  Why don't you rest?


The animation sequence itself contains many objects that come directly from the story. Most of them I recognized, but where do these little nuts come from in the subtitle translation? Was it a mistranslation or some subtle reference to the events of the story? I wonder if the differences are because of some double-meaning words or some hidden context that one of the translators (or both) didn't get.
Seems like the translation has been fixed in your link, it no longer says nuts.
Also the original translation you quoted had many mistakes in it, for example this:

You wave your chestnut like a flag, little squirrel

The lyrics at that point is 旗振る子リス which means Little squirrel waving a flag transliterated, and nothing suggesting about waving chestnuts. In the corrected version on the site by Ohseki, it is now translated as Little squirrel, waving your flag.
I'm pretty sure that it was just a bad translation overall.