I've seen this too; running firefox from the command line results in
this output:
GCJ PLUGIN: thread 0x6228d0: NP_GetMIMEDescription
GCJ PLUGIN: thread 0x6228d0: NP_GetMIMEDescription return
GCJ PLUGIN: thread 0x6228d0: NP_GetValue
GCJ PLUGIN: thread 0x6228d0: NP_GetValue: returning plugin name.
GCJ PLUGIN: thread 0x6228d0: NP_GetValue return
GCJ PLUGIN: thread 0x6228d0: NP_GetValue
GCJ PLUGIN: thread 0x6228d0: NP_GetValue: returning plugin description.
GCJ PLUGIN: thread 0x6228d0: NP_GetValue return
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: GetValue variable 1 (1)
** Message: GetValue variable 2 (2)
** Message: NP_Initialize
** Message: NP_Initialize succeeded
** Message: totemPlugin ctor [0x30e1140]
** Message: Init mimetype 'audio/x-pn-realaudio-plugin' mode 1
** Message: Base URI is
'http://www.bbc.co.uk/radio/aod/networks/sportsextra/live.shtml'
** Message: Real mimetype for 'audio/x-pn-realaudio-plugin' is
'audio/vnd.rn-realaudio'
argv[0] src /fivelive/live/surestream_sportsextra.rpm
argv[1] type audio/x-pn-realaudio-plugin
argv[2] pluginspage
http://www.bbc.co.uk/webwise/askbruce/articles/download/howdoidownloadrealplayer_1.shtml
argv[3] name RP
argv[4] autostart true
argv[5] console one
argv[6] nojava true
argv[7] style position: absolute; left: -5000px;
argv[8] height 0
argv[9] width 0
** Message: Representant for the console class is (nil)
** Message: mSrc: /fivelive/live/surestream_sportsextra.rpm
** Message: mCache: 0
** Message: mControllerHidden: 0
** Message: mShowStatusbar: 0
** Message: mHidden: 1
** Message: mAudioOnly: 0
** Message: mAutostart: 1, mRepeat: 0
** Message: mConsole: one
** Message: mControls: All
** Message: Launching: /usr/lib/totem/gstreamer/totem-plugin-viewer
--plugin-type complex --user-agent Mozilla/5.0 (X11; U; Linux x86_64; en-GB;
rv:1.9) Gecko/2008061017 Firefox/3.0 --mimetype audio/vnd.rn-realaudio --hidden
** Message: Viewer spawned, PID 16275
** Message: GetValue variable 14 (e)
** Message: GetValue variable 15 (f)
** Message: Unhandled variable NPPVpluginScriptableNPObject
** Message: GetValue variable 11 (b)
** Message: GetValue variable 268435466 (100a)
** Message: GetScriptable [0x30e1140]
** Message: totemComplexPlugin ctor [0x30f6060]
** Message: GetValue variable 15 (f)
** Message: Unhandled variable NPPVpluginScriptableNPObject
** Message: GetValue variable 11 (b)
** Message: GetValue variable 268435466 (100a)
** Message: GetScriptable [0x30e1140]
E: shm.c: shm_open() failed: Read-only file system
TotemEmbedded-Message: Viewer state: STOPPED
** Message: Viewer DBus interface name is 'org.gnome.totem.PluginViewer_16275'
** Message: NameOwnerChanged old-owner '' new-owner ':1.79'
** Message: Viewer now connected to the bus
** Message: ViewerSetup
** Message: ViewerReady
** Message: IsSchemeSupported scheme 'http': yes
** Message: NameOwnerChanged old-owner '' new-owner ':1.79'
** Message: Already have owner, why are we notified again?
TotemEmbedded-Message: totem_embedded_open_stream called: uri
http://www.bbc.co.uk/fivelive/live/surestream_sportsextra.rpm, base_uri:
http://www.bbc.co.uk/radio/aod/networks/sportsextra/live.shtml
TotemEmbedded-Message: totem_embedded_open_internal 'fd://0' is-browser-stream
1 start-play 1
TotemEmbedded-Message: BEFORE _open
TotemEmbedded-Message: AFTER _open (ret: 1)
TotemEmbedded-Message: Viewer state: PLAYING
** Message: OpenStream reply
** Message: DoCommand 'Play'
** Message: NewStream mimetype 'audio/x-pn-realaudio-plugin' URL
'http://www.bbc.co.uk/fivelive/live/surestream_sportsextra.rpm'
** Message: Is special type 'text/uri-list'
** Message: Is playlist; need to wait for the file to be downloaded completely
** Message: StreamAsFile filename
'/home/mdoube/.mozilla/firefox/oup10qce.default/Cache/7219AF36d01'
TotemEmbedded-Message: Setting the current playlist to
/home/mdoube/.mozilla/firefox/oup10qce.default/Cache/7219AF36d01 (base:
http://www.bbc.co.uk/radio/aod/networks/sportsextra/live.shtml)
** Message: DestroyStream reason 0
added URI
'rtsp://rmlive-acl.bbc.co.uk/bbc-rbs/rmlive-acl/ev7/live24/radio5/sportsextra/live/r5sx_tl_g2.ra?BBC-UID=b48825ef2c000b448fd11399d0c01aec98741d88f020313444cf99c6ef8e4097SSO2-UID='
TotemEmbedded-Message: totem_embedded_open_internal
'rtsp://rmlive-acl.bbc.co.uk/bbc-rbs/rmlive-acl/ev7/live24/radio5/sportsextra/live/r5sx_tl_g2.ra?BBC-UID=b48825ef2c000b448fd11399d0c01aec98741d88f020313444cf99c6ef8e4097SSO2-UID='
is-browser-stream 0 start-play 0
TotemEmbedded-Message: BEFORE _open
TotemEmbedded-Message: AFTER _open (ret: 1)
** Message: NewStream mimetype 'audio/x-pn-realaudio-plugin' URL
