Gaussian blur-- posterization

Hi all-
In a current project, I'm using some blurring effects through time (either a shot starts off blurry and comes into focus, or the reverse direction). All of the raw footage starts out completely in focus.
I have been using the "Gaussian Blur" effect in FCP, but I'm finding that as the blur amount changes through time, the image gets very posterized (i.e. distinct color bands, rather than gradual color shift), especially if there is motion in the shot that I'm blurring.
Does anyone recommend a way to eliminate the posterization artifacts, or a different effect or plug-in that will accomplish my image blurs with a more natural-lens look and quality?
Thanx gang.
-Chris

Yup, that's it, Jerry.
But in another FCP group, a listserve, I belong to, in a recent thread about 10-bit video in Final Cut, some well respected professionals did some testing. Oliver Peters posted this reply:
OK, I've had a chance to get back to this and ran another test this morning. SD input from DBeta to Kona2 using bars from DBeta tape. Captured bars both as 8-bit and 10-bit
media. Created 5 timelines:
1. 8-bit with 8-bit processing
2. 8-bit with HPYUV processing
3. 10-bit with 10-bit processing
4. 10-bit with HPYUV processing
5. 10-bit with 8-bit processing
Applied 3-way CC to the clips and compared no effect, effect rendered and effect previewed (not rendered). When you leave the CC settings at default, i.e. no adjustments, all timelines and all combinations of rendered, unrendered and no effect match each other on the scopes. (Note, that there was a very slight change on the 8-bit processing in the
10-bit timeline.) However, when you actually change the settings, i.e. apply CC changes, then ALL 10-bit and HPYUV combinations show a shift between rendered and preview of
the effect. The ONLY timeline where there was no change was #1, 8-bit with 8-bit processing. Also the 8-bit within the 10-bit timeline had extremely little change, but of course you take a hit stepping down to 8-bit processing. The changes that I saw were minor luma shifts (mainly in the midrange) and subtle vector shifts.
Quad-core G5 5GB RAM, Aja Io-LA, FCS 5.1 Mac OS X (10.4.6) Lots of toys

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When I create a symbol out of this, here is the problem (note the "excess" areas on the top and right):
...resulting in this messed up globe...
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We just got brand new systems at work less than a month ago and this event has happened twice since then. When using Photoshop CS5 Extended and using Gaussian blur the file becomes blocky and all layers as well as their masks become corrupted with these blocks. Can anyone help or is there any advice?
Here are my system specs...
Model Name:    Mac Pro
Model Identifier:    MacPro5,1
Processor Name:    6-Core Intel Xeon
Processor Speed:    2.66 GHz
Number Of Processors:    2
Total Number Of Cores:    12
L2 Cache (per core):    256 KB
L3 Cache (per processor):    12 MB
Memory:    16 GB
Processor Interconnect Speed:    6.4 GT/s
Boot ROM Version:    MP51.007F.B00
SMC Version (system):    1.39f11
SMC Version (processor tray):    1.39f11

I'm getting this same issue - or a similar one. It seems to only happen when I run the Gaussian blur command, and during the same process in my workflow. It also seems for me to happen when I have made a selection from a layer above that is a smart object.
Let me describe the scenario that I have experienced a couple times in the past week. (BTW I just upgraded to CS5 only a couple weeks ago).
Usually I have a document open with dozens or hundreds of layers. The effect that I am executing when this seems to happen is where I have a group of shapes or placed image smart object layer and I'm creating a shadow layer by making a blank layer below said group or image, making a selection from the above group or image, and then filling the selection in the blank layer with a color - which I then run the Gaussian blur filter on, and afterward warp transform to get my realistic looking shadow effect.
But the problem is in seemingly random instances and on seemingly random documents when I run that Gaussian blur, Photoshop freaks out and craps the bed. And by craps the bed I mean deletes pixel data from multiple layers in my document very randomly, and also generates odd bright colors all throughout the document.
You can see the initial freak out in this screen shot from when I just initially selected the Gaussian blur filter from the menu (but had not yet even clicked "OK"): http://cl.ly/3KTx . The strange thing is that I had just run this series of steps on the above layer which in the screen shot you'll see as "Layer 44", and all was well.
Here's a screen shot showing the file after I closed it out, restarted Photoshop, and opened the file back up: http://cl.ly/3K2C . In case you can't tell, data from several layers all over the file is missing and corrupted.
I'm sure I don't have to explain how exasperating this is, as this represents more than a year's worth of work on a client project, no joke. Fortunately I'm mostly done with the actual site build, but that makes the loss of the artwork files of no less consquence - especially seeing as how I'm not ACTUALLY finished and I did in fact need all of that data to complete the project.
Anyhow, some additional details which may or may not be related to the issue:
- The issue seems to happen randomly. As stated above the same steps did not produce the error just a few minutes before.
- I have had this issue with another file this week where I was doing the same processes on another shape.
- It seems that this is occuring when I make the selection from a layer that is a smart object of some type
- I also noticed artifacts in the weird colors (after I tried running the processes again, so not in the above screenshot) that were actually design elements from an entirely different document that I was working with earlier this evening.
- I have filed a bug report.
Dunno what else to describe, but I hope you guys can get this figured out, seriously. I paid way too much for my upgrade to CS5 to have bugs in key software features corrupt my files thank you.
Also, in regards to my system...
Model Name: Mac Pro
Model Identifier: MacPro4,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.26 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per core): 256 KB
L3 Cache (per processor): 8 MB
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Processor Interconnect Speed: 5.86 GT/s
Boot ROM Version: MP41.0081.B07
SMC Version (system): 1.39f5
SMC Version (processor tray): 1.39f5
Chipset Model: NVIDIA GeForce GT 120
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0640
Revision ID: 0x00a1
ROM Revision: 3386
Displays:
Display Connector:
Status: No Display Connected
LED Cinema Display:
Resolution: 1920 x 1200
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
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wildbirdsketch,
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Gaussian blur-- posterization

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