To fix various security problems we released update packages that bring Mozilla Firefox to version 1.5.0.6, MozillaThunderdbird to version 1.5.0.5 and the Seamonkey Suite to version 1.0.3.
There is no known workaround, please install the update packages. If you are using the old Mozilla Suite browser we recommend no longer using it, but switching to Mozilla Firefox, konqueror or Opera.