I reported this bug in #731966 back in 2011-03-11.
It's not limited to the 64bit version.
I'm using: i686 2.6.38-8-generic-pae xubuntu 11.04 firefox 5.0 acroread 9.4.2
All patched up to the latest version this morning.
Still same problem.
It was introduced by acroread 9.4.2, the 9.4.1 version was OK.
I reported this bug in #731966 back in 2011-03-11.
It's not limited to the 64bit version.
I'm using: 8-generic- pae
i686 2.6.38-
xubuntu 11.04
firefox 5.0
acroread 9.4.2
All patched up to the latest version this morning.
Still same problem.
It was introduced by acroread 9.4.2, the 9.4.1 version was OK.