Hey List, I'm using Debian Sid in my Dell Inspiron 2200 laptop. Recently after I aptitude update and aptitude upgrade I got the following error. aptitude: symbol lookup error: aptitude: undefined symbol: _ZN9pkgPolicyD2Ev It has been there for several days. Did any of you come across the same problem? Can any of your give me some hint on this please? Thanks a lot in advance! Rocky