Undo shortcut intermittently doesn't work

Question

Hi guys,
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PS CS5
Mac 10.6.6
16gb RAM

Answer 1

Yep, it is fully updated.  I¹ve already tried throwing away my preferences,
yet the ³undo² problem happened again.  I¹ve re-started, repaired
permissions and etc. I should tell you that I can undo, just not with the
keyboard shortcut.  Nor, when the shortcut problem comes up, will my mouse
scroll wheel make the contents of a palette go north and south.  Another
weird thing that has happened once or twice is that the image thumbnails in
the layers palette have not displayed the mask, in both adjustment and image
layers, after I¹ve used a brush of any kind.  Instead, the thumbnail of the
mask will look like the gray and white checkerboard that transparent layers
show.  I can get the thumbnail mask to come back if I click several times on
adjacent thumbnails.  It kind of seems that PS is running too slowly to
re-write the thumbnail immediately, which doesn¹t make sense because the
MacPro is a 2.93ghz eight core running 16gb of RAM.  The file sizes I work
on vary from 30mb to 500mb or so not too huge, though I think the ones
that have the problems I¹ve described are on the larger side.  I¹ve got it
set for 25 history states, which ought to be ok.
Another odd thing.  I often have 2-4 images open at a time, and the problems
will only be happening to one of those images. On all the other images the
shortcuts, scroll wheel, thumbnails are all ok.  Any ideas what the hell is
going on here?
Thank you very much for your help,
Todd Pearson
http://www.toddpearsonphotography.com/
c.pfaffenbichler2/24/11 11:56 [email protected]
Is Photoshop fully updated?
(boilerplate-text) As with all unexplainable Photoshop-problems you might try
trashing the prefs (after making sure all customized presets like Actions,
Patterns, Brushes etc. have been saved and making a note of the Preferences
you¹ve changed) by pressing command-alt-shift on starting the program or
starting from a new user-account.
System Maintenance (repairing permissions, purging PRAM, running cron-scripts,
cleaning caches, etc.) might also be beneficial, Onyx has been recommended for
such tasks.
http://www.apple.com/downloads/macosx/system_disk_utilities/onyx.html
Weeding out bad fonts never seems to be a bad idea, either. (Validate your
fonts in Font Book and remove the bad ones.)
If 3rd party plug-ins are installed try disabling them to verify if one of
those may be responsible for the problem.
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