firefox which no wxdfast fails to start

[rfjones]

fedora fc6 java  "1.6.0_01"
firefox 2.0.3 gives the following error when started, and occasionally
fails to start at all. A reinstall usually fixes this; but now I have to
reinstall in another directory to get a browser
any ideas?
TIA
rfjones
which: no wxdfast in
(/usr/jdk1/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin:/usr/jdk1/jre/bin:/usr/local/ant/bin:/var/lib/pgsql/bin:/opt/openoffice.org2.1_sdk/linux/bin:/usr/local/Acrobat5/bin)
which: no kget in
(/usr/jdk1/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin:/usr/jdk1/jre/bin:/usr/local/ant/bin:/var/lib/pgsql/bin:/opt/openoffice.org2.1_sdk/linux/bin:/usr/local/Acrobat5/bin)
which: no gwget in
(/usr/jdk1/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin:/usr/jdk1/jre/bin:/usr/local/ant/bin:/var/lib/pgsql/bin:/opt/openoffice.org2.1_sdk/linux/bin:/usr/local/Acrobat5/bin)
which: no d4x in
(/usr/jdk1/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin:/usr/jdk1/jre/bin:/usr/local/ant/bin:/var/lib/pgsql/bin:/opt/openoffice.org2.1_sdk/linux/bin:/usr/local/Acrobat5/bin)
which: no nt in
(/usr/jdk1/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin:/usr/jdk1/jre/bin:/usr/local/ant/bin:/var/lib/pgsql/bin:/opt/openoffice.org2.1_sdk/linux/bin:/usr/local/Acrobat5/bin)