I have also since my last post not been able to track down a specific pattern how this occurs, but it indeed seems to be a very random behaviour.
I don't think it's related to Vista x64 / Dopus x64. Becuase I had this exact same behaviour on XP32 / Dopus 32. The common factor was though that both machines had Multi-Core CPUs. And thread error do seem pretty related to having a computer with several CPUs or Cores.
I run Opus on several 32-bit machines with multiple CPUs and have never seen this crash and all but one person reporting it has 64-bit Vista so I'd say it's 64-bit related. If you've seen crashes while dragging on 32-bit then they are probably something else.
Thread crashes in general don't have anything to do with having or not having multiple CPUs. All the crash dialog is telling us is that a thread has crashed and that can happen whether you have 1 or 50 CPUs. (Of course, some problems become more likely if you have multiple CPUs but there's nothing here which suggests that's a factor.)
Nudel: thanks, I stand corrected about the core thingie. 
Another common factor, is that it has been image files (png, jpgs...) that I have been dragging everytime since I started making a note when I get these crashes in 9.1. I have run Dopus in details mode these times, so no thumbnails.
I just wanted to note that I am experiencing this problem as well with some drag and drop operations.
I am running DO x64 on Windows Vista Ultimate x64.
The problem seems to disappear if I right click on the file and then drag.
There has never been a crash so far if I right click and open the context menu first and then let the context menu close and drag the file.
This might help the programmers identify the cause.
I don't think the two problems are related. One is about dragging & dropping files and the other is about moving toolbars around.
To avoid things getting confusing I've split your post into a new topic here (also got a question for you to try to track down the problem, but I'll ask it in the new thread):
Count me among the ones experiencing this error.
Aaand yes, I am running Vista 64.
I will check if I see the same thing on 32bit...
The number of people with this problem is growing like an avalanche.
Are DOpus programmers even working on this? They are awfully quiet...
[quote="magius"]Count me among the ones experiencing this error.
Aaand yes, I am running Vista 64.[/quote]
Same for me too. 
[quote="7331a"]The number of people with this problem is growing like an avalanche.
Are DOpus programmers even working on this? They are awfully quiet...[/quote]
Ask them, not us here at the forums.
I've sent in a support ticket, so they don't miss it. I'm sure they will find a solution to it in the not to distant future.
(Nudel: I just saw your tweaking guide for the Dell 24" screen. I've one of those around here and your guide was excellent. Thanks a ton for that one. 
)
I uninstalled 9.1 x64 and tried to install x86, but it detects that my system is x64, so it doesn't install.
So 9.1 x64 doesn't work, it doesn't let me install x86, what a nightmare this 9.1 has turned out to be...
Returning to 9.0.0.9 has solved everything...
We have been trying to get this issue resolved but so far none of the people we have asked to try test versions have responded.
Anyone who would like this issue fixed and is prepared to actually try a test version and report back, please speak up.
Obviously this is not such a major issue after all, since no one has actually offered to help with the testing of this. Glad we can stop worrying about it then
Don't you dare stop worrying. 
I'll keep those test reports coming for as long as it takes.
Here, here! I'd also like to help out testing as this bug is driving me INSANE! (Vista Ultimate 64-bit). Tell me what to do and I'll gladly be of assistance 
[quote="artstorm"]Don't you dare stop worrying.
I'll keep those test reports coming for as long as it takes. [/quote]
Is that an offer to try the test version Jon mentioned? (Or have you already got in touch with each other and you're already trying it? If so does it seem okay so far?)
yes, I've been able to test it, so I'll torture it with filedragging and collect memory dumps to help out as much as I can with providing Greg and Jon with the information they need to find and squash this bug. I hope others with the problem start to do the same, and I am sure this will be fixed soon.
I'm running Opus 9.1 on 3PC's currently, the x86 Version running on XP32 never showed the problem, the x64 Version on Vista Ultimate x64 runs on the two others and the error happens on both of them. So far I couldn't make out a reason that causes it. It doesn't seem to be related to specific file types, I even had it happen when dragging text files. Once the error showed up it will keep on happening until the system is actually restarted.
If I can be of help testing let me know.
well, got the same fault with my vista64.
any new output from the developers (status) ? any chance in the near future for a fixed release ?
thanx for any vital signs. 
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