Update to flashplugin-nonfree 12.1 doesn't work with konqueror

Here is the backtrace from konqueror:

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1233525056 (LWP 26447)]
[New Thread -1286866032 (LWP 26456)]
[New Thread -1277662320 (LWP 26455)]
[New Thread -1269269616 (LWP 26454)]
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[KCrash handler]
#6 0xb7b19fd7 in XtRemoveTimeOut () from /usr/lib/libXt.so.6
#7 0xb5d34db1 in ?? ()
   from /usr/lib/firefox/plugins/flashplugin-alternative.so
#8 0xb5d2a338 in ?? ()
   from /usr/lib/firefox/plugins/flashplugin-alternative.so
#9 0xb5d23181 in ?? ()
   from /usr/lib/firefox/plugins/flashplugin-alternative.so
#10 0xb5d27937 in ?? ()
   from /usr/lib/firefox/plugins/flashplugin-alternative.so
#11 0x080cd4f0 in ?? ()
#12 0xbfcf6418 in ?? ()
#13 0xbfcf63e8 in ?? ()
#14 0xb7ab8d81 in operator delete () from /usr/lib/libstdc++.so.6
#15 0x0805b62f in NSPluginInstance::destroy ()
#16 0x0805d78d in NSPluginInstance::~NSPluginInstance ()
#17 0xb7042890 in QGList::remove () from /usr/lib/libqt-mt.so.3
#18 0x0805652f in NSPluginClass::timer ()
#19 0x080565c1 in NSPluginInstance::shutdown ()
#20 0x080593b9 in NSPluginInstanceIface::process ()
#21 0xb723a0d7 in DCOPClient::receive () from /usr/lib/libD...

Flash 12.1 does not work at all on firefox for me. Have not tried it on any other browser. Downgrading back to the old version resolves it... Sigh.

Fixed using the purge outlined in: https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/189870
(don't forget to add "sudo" before each command). But surely the purge (or a similar fix) should be in the auto-update, otherwise it will screw a lot of people over who don't know how to sort out such things?

Yes the fix in https://bugs.launchpad.net/ubuntu/+source/flashplugin-nonfree/+bug/189870 fixes the installation issue which I think is a package problem.

But after installation and confirming it works in firefox it still doesn't work in konqueror. It crashes when it tries to load the plugin

The latest flash plugin indeed doesn't work in Konqueror, Mike Arthur wrote about a workaround using KMPlayer here http://mikearthur.co.uk/?p=171 (still got to try it out) and the explanation why it doesn't work is jotted down by Lubos Lunak here http://www.kdedevelopers.org/node/3162

See also
https://bugs.launchpad.net/ubuntu/+source/kmplayer/+bug/190168
and
https://bugs.launchpad.net/ubuntu/+source/kmplayer/+bug/190169

Is there any way to temporarily roll back to the previous version? Maaan I regret I accepted the flashplugin update in adept :(

Why is an update released when it does destroy the functionality we want?

Because there are serious security holes in the previous one and Adobe broke the fixed one in Konqueror (see the links I posted). If you wan to use the previous one anyway, you can get an archive with the old versions here http://www.adobe.com/go/tn_14266 Its 9r48 you're looking for, but remember that it has those security issues and some (not sure if any from that version though) are already exploited.