Sorry for the delay.  Yes, it seems you have MANY ppa's that were in use at one 
point (look at /sources.list.d).  Consider using the tool, 'ppa-purge' to 
remove the packages installed with the ppa's. 
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https://bugs.launchpad.net/bugs/788333

Title:
  Could not calculate the upgrade 10.10 -> 11.04

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