I just write here some informations I found on the web. On my Linux Ubuntu 9.10 64 bits, the flash plugin sometimes doesn't register mouse clicks. To fix it, edit the following file by doing :
sudo gedit /usr/lib/nspluginwrapper/noarch/npviewer
and add this export
sudo gedit /usr/lib/nspluginwrapper/noarch/npviewer
and add this export
export GDK_NATIVE_WINDOWS=1
like this
#!/bin/sh
#
# nsplugin viewer wrapper script...
OS="`uname -s`"
ARCH="`uname -m`"
NPW_LIBDIR="/usr/lib/nspluginwrapper"
export GDK_NATIVE_WINDOWS=1
if test -z "$TARGET_OS"; then
...
Enjoy!