A Java Web Start application triggers a spurious missing manifest permissions warning, if jar versioning
is used in the jnlp file.
So, two versions of the same application bejhave differently:
(1) no jar versioning is used in jnlp file: no yellow warning is shown in the security warning
(2) jar versioning is used in jnlp file: yellow warning about missing manifest permissions attribute is shown
in the security warning
The behaviour was verified using 32-bit Java SE 7 Update 51 (b13) on Windows Vista SP2.