if you get game crash (usually so called silent Crash To Desktop or with some error msg)
try locate the files arma2oa.mdmp and arma2oa.bidmp
together is also located arma2oa.rpt file
(this log file from same moment of crash is very important for complete analysis)
compress them (ideally with 7-zip but zip or rar do it too)
and send to my nickname on this forum @bistudio.com email
use subject: [Crash] sometext
you may add some commentary about what you done / where it happened
but it's not needed ...
another option is USE CIT and create bug report ticket and upload the files there as part of the report
read more here : http://forums.bistudio.com/showthread.php?t=102991
^^^ so there are at minimum 2 ways how report crashes ! do not hoard the dumps!