What is this alert?

What is this alert on my xubuntu 14.04 system. I get this error every 1-4 hour?

You can view the the crash reports in /var/crash/ via a text editor to see why you are getting the alert.

https://wiki.ubuntu.com/Apport

i was get next listing on /var/crash/

-rw-r----- 1 mr whoopsie 5013569 Feb 11 19:22 _opt_google_chrome_chrome.1000.crash -rw-rw-r-- 1 mr whoopsie 0 Feb 11 19:22 _opt_google_chrome_chrome.1000.upload -rw------- 1 whoopsie whoopsie 0 Feb 16 19:22 _opt_google_chrome_chrome.1000.uploaded -rw-r----- 1 root whoopsie 29107433 Feb 11 20:48 _usr_bin_wireshark.0.crash

Try removing the reports and see what pops up next.
sudo rm /var/crash/*

if i doing disable iptables block traffic, then i don't get this error.

it turns out that, i have trojan n my PC, which one doing connect to remote server...but iptables will blocking this trojan, and i will having this error.

Interesting. What's the deal with the group "whoopsie"?

mark@mark-OptiPlex-755:/var/crash$ ls -l
total 1484
-rw-r----- 1 root whoopsie 1497815 Feb 24 22:34 _sbin_upstart.0.crash
-rw-r----- 1 root whoopsie   18854 Feb 21 13:01 _usr_bin_add-apt-repository.0.crash
mark@mark-OptiPlex-755:/var/crash$