UPDATE:
I reported this problem to Peppermint too. PCNetSpec said that Peppermint had a the same problem there "with Chromium not being able to correctly extract/report the pepperflash version, so it defaults to 99.999.999.999" He said, "That's not a functionality problem, just a reporting issue...."
We hope this link helps the team at Opera do something similar.
This link helps explain what Team Peppermint did to resolve this issue for Chromium browser.
http://forum.peppermintos.com/index.php/topic,2935.msg29027.html#msg29027
Here are the contents of our /etc/chromium-browser/default:
part for pepperflashplugin-nonfree : beginflashso="/usr/lib/pepperflashplugin-nonfree/libpepflashplayer.so"
if [ -f $flashso ]
then
flashversion=strings $flashso|grep ^LNX|sed -e "s/^LNX //"|sed -e "s/,/./g"
CHROMIUM_FLAGS="$CHROMIUM_FLAGS --ppapi-flash-path=$flashso --ppapi-flash-version=$flashversion"
fi
We hope our friends here at Opera will find this information helpful.
perknh (with the knowledge and experience of PCNetSpec himself!)