/usr/bin/putty:11:sk_addr_free:net_select_result:select_result:fd_input_func:g_main_dispatch

The Ubuntu Error Tracker has been receiving reports about a problem regarding putty. This problem was most recently seen with package version 0.70-4, the problem page at https://errors.ubuntu.com/problem/640c4f4a09befbcb85f89d1b9a7e6242cdf1e803 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.