Confirmed that the California link is suspect.

Quick cross-check:
Georgia:
CRC: 2AFD6A5E
MD5: 875a57102ad6bec1ed9bb6861b016c74

California:
CRC: 233A03B1
MD5: 518c3d2e9cd5a04f18662414db7f6d1c

Illinois (1)
CRC: 2AFD6A5E
MD5: 875a57102ad6bec1ed9bb6861b016c74

Illinois (2)
CRC: 2AFD6A5E
MD5: 875a57102ad6bec1ed9bb6861b016c74

Edit:
All the other links I could get through to had the correct file.

Othe mirror issues:
I couldn't resolve http://mirc.purehostings.net (4th Singapore link).

The following links didn't work:
http://mirc.globalwiz.com.sg/mirc616.exe (5th Singapore link)
http://mirror.pacific.net.au/mirc/mirc616.exe (2nd Australia link)
http://www.mirc-help.de/mirc/mirc616.exe (3rd Germany link)

Also http://mirc.vodien.com (1st Singapore link) redirected to an intermediary (mostly IRC related) page.