Many visits with Netscape Browser in log import mode (2 replies)

Hi,
I installed Piwik in Log import mode, and I found that the most used Browser is... Netsacpe??
I searched into the logs that I import using the python script, and "Netscape" never occurs.
I noticed something similar on your demo sites: Netscape never occurs in demo.piwik.org, but is largely the most used browser in demo-log-analytics.piwik.org.
May be there's something wrong in the user agent parser when running in log import mode? Or in the import script itself?
Thank you in advance!