Why, in Lion, do program windows disappear?

Navigating among programs, I lose windows, mail for example. Either I must exist the program and re-open it, or click on "new window" to visualize it again. Admittedly, I often use a lot of "heavy" programs such as Photoshop and Bridge.

Post this in the Lion forums.
https://discussions.apple.com/community/mac_os/mac_os_x_v10.7_lion
B-rock

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MBA lion Mail issue: window disappears randomly

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3) emails deleted within the 'inbox' section will not delete in the Gmail section (setup as IMAP, with Gmail defaults)
I am a little concerned with 1 & 2 becuase these are huge user experience issues, it is the most frustrating thing to have to continually use the short cut to open up a window which should not have disappeared in the first place!!
any help would be appreciated, thanks in advance!

Hi Fred
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e
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Premier Pro CS6, Why is my top-right Program window blank?

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Something very peculiar has begun happening today and I will describe its features below:
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2) Sometimes all the windows entirely in all spaces would disappear.
3) When I turned spaces off and on again the would usually reappear.
4) Sometimes when using the keyboard command to switch spaces the desktop background would change
5) When pressing Apple-Tab to switch applications, at first certain programs would not show their icon, but simply a white square, and then the bar of applications would not be visible at all. It was still possible to change between programs, but the icons were not at all visible.
6) I later found out that the problems were minimized if I reduce the number of open applications. The problems occurred when I had about 20 applications open simultaneously. I still had over 700 MB of free RAM, so that was not the problem. When I quit about half of the applications, all the goofy-ness with Spaces stopped.
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I have a similar issue with Spaces. Windows just seem to disappear. The menus are available if I click on them in the dash, however the windows are still missing. Sometimes manually assigning them in Spaces will bring them back, but then they just disappear again.
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Hi Alinc,
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2) A better but less potent thing to try is cleaning up you finder folders. If like me you have hundreds of files in one folder, or there is more than a gigabyte of data in the first level of the folder, then it might be a good idea to clean it up by moving some of those files into subfolders.
3) This is my favorite fix to try, and I recommend it to almost everyone because it's super easy and has a reasonable chance of improving your computer's performance at least a little bit.
3.a) Go to Disk Utility, and click on your hard drive.
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3.d) If you have any other connected hard drives or partitions you can do this for them as well. BUT, I don't recommend doing this on any Windows formatted drives, like FAT or NTFS, or your Bootcamp partition — although the First Aid buttons on the Bootcamp will probably be disabled anyway.
Best,
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Safari 3.0.4 on OS 10.5.1 not crashing but browser windows DISAPPEAR! Help!

I know there is a thread in the beta forum with a generic title "Safari acting strange" but I figured a more specific thread title might get more attention from those experiencing the same anomalies.
Here is my problem:
I'm using Safari 3.0.4 that came with the Leopard 10.5 disk I installed on my laptop. Safari was working fine for a good couple weeks and then suddenly it began acting strange indeed.
Now after an undetermined amount of time when I have a Safari browser window(s)/tab(s) open it will suddenly disappear off my screen without provocation (meaning I don't have to perform any action to do this. I can be sitting there not touching the laptop or typing anything; it will just disappear as if some unseen person with a remote control hits the Let's-mess-with-this-guy's-computer button). At first glance it seems that Safari has crashed.
However when I look to see what happened or perhaps relaunch I see that Safari is still up and running. The menu bars all work. It seems to be in perfect working order. Only problem is the browser windows have disappeared and nothing I do will bring them back. I can try to create new browser windows and Safar thinks it is creating them because I can check in Windows menu and see the fruits of my efforts stacking up more and more as I add new windows and tabs in an attempt to get the browser windows back. However where these windows live is a mystery to me. When I try to quit Safari I get an Alert message asking me if I really want to close the windows with the multiple tabs in them (further supporting the theory that Safari still thinks windows are open and seeable by me)
When I DO quit Safari and relaunch it, it remains in the same state. No browser window is seen yet looking in the Windows menu I can see that a new browser window is present. The only way to use my Safari again is to reboot my computer. Of course this fixes the problem for maybe 5 minutes until the browser windows disappear again. And that's when I switch to Firefox.
I've repaired permissions. I've checked for any Input Managers folder for culprits but seeing as this is a fairly new laptop and that I just did an Archive and Install of Leopard with a fresh Safari in toe I have not installed any 3rd party applications so no Input Managers folder exists anywhere on my laptop.
I have the standard Safari Plug-Ins that come with Quicktime.
I have Spaces turned off. I am not using dual monitors so the browser windows are not being shot off to a second screen somewhere.
I see nothing in the crashlog because I actually don't think Safari is treating this behavior as a crash. It's not quitting unexpectedly or anything.
So I am at a total loss. Any ideas?

I had this problem as well.
First: In Safari go into preferences and select the "security" tab. Uncheck "Enable Plug-ins"
This fixed a lot of bugs for me !
Second: If that worked than you just need to go to Hard Drive/Library/Internet Plug-Ins
There should be a folder there that is called "Disabled Plug-Ins" I just put all of the plug-ins in that folder, went back and rechecked " Enable Plug-Ins" in Safari preferences, and then one by one added plug-ins back out of the disabled folder while reloading a web page that caused problems before. After some trial & error I think I have a setup that works for now. Hope this helps!! Also as of now I have installed all software updates. My mac has been doing this for a while. Logging out & back in reset safari back to where it was useable.
I have not had problems with any other programs.

Why, in Lion, do program windows disappear?

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