applications freezing in lucid

[Michael Weaver]

I have mentioned this on the Orca list but not sure if this is an Orca
or a Ubuntu problem but I seem to hav3e this problem where after a
certain length of time, applications freeze in Lucid and I don't think
it has anything to do with having to type a password because the
screensaver has come on and I am asked for my password to unlock the
screen.
What seems to happen is that either applications refuse to either launch
or if they are launching which I think they possibly might be sometimes
is that Orca doesn't read them like it isn't focusing on the app I am
trying to use.
I am guessing that they may be launching because sometimes if I press
ALT plus F4 I get back to the application which may be running at the
time or it will go to the desktop.
I thought this application freezing problem might have had something to
do with how i installed Lucid or even an old disk which wasn't
installing properly but I have done a fresh install with the same CD and
even tried burning a fresh one and doing another install only I am
having this same strange problem.
Has anyone else noticed this problem?
I also thought it might have had something to do with installing certain
software such as Extra pluggins only it does this thing without such
software being installed.
This is a problem which even sometimes causes me to have to something as
drastic as pressing and holding the power button of my computers as CTRL
ALT delete doesn't appear to work these days.
It is a problem which I wonder if anyone else has noticed.
If it is a serious problem I have found unfortunately I don't have the
technical knowhow to be able to file a bug on it, create a report or
whatever on the thing.
This problem may for example happen when using Transmission when it has
been left for a while and you try to for example open Evolution but this
even happens with single apps when you have left the PC for a while and
sometimes it acts like it loggs out and it wants your username and
password again and sometimes entering these details unfreezes the PCs
and sometimes it doesn't so it seems to me to be a strange problem.