When you say that there is no update log generated, do you mean that the directory .feedingit/logging is empty? Can you please post the output of dpkg -l feedingit. Looking at the error message: could it be that the error occurs when updating the archived articles, but not when updating other feeds?
~ $ dpkg -l feedingit Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-==============-==============-============================================ ii feedingit 0.9.1-2 A RSS feed reader with portrait mode support