What version of BearShare are you running ?
What else may have occured such as virus or power cut problems ?
Go easy for now because you may be at risk of losing your temporary/incomplete files as well as your completed downloads.
Also, please see
http://www.gnutellaforums.com/open-d...sabotaged.html
You may be encouraged to install a superior version of BearShare after reading the info available via the above link !