When I log in, after my password is accepted, I always get this screen:

Note that this is not my log in screen, I'm past that at this point. It's inside the CRM, I have the menus, but I'm asked to replace my expired password.
It doesn't matter if I use the same password or a new one, and it doesn't matter if's a simple or complex password.
After putting in the new password, I can use the CRM correctly. When I need to log in again, though, I am always taken to that same screen.
There should be some message - either accept the old password for good, or tell me why not and force me to provide a valid one.
I believe this is related to the default password expiration set in the config. We'll need to change the default to something reasonable but you can change it manually as a temporary workaround.
Yes.. this is part of issue which i reported, @pgorod please look on #4552 if it solves your issue ticket
This is not solved in Beta3. And it happens to all users I tried, not just one. Probably the same issue as #4722.
This is a test system that I've been successively upgrading. I don't remember exactly where I started, maybe 7.8.something, but it's been getting every small upgrade since.
In this case, I believe the issue was introduced upgrading from 7.9.x to 7.10 Beta1.
I believe 7.9 was at version 7.9.7 when the Beta1 came out?...
There is a work around.
This should get rid of the issue in the mean time.
The Password Management screen only has and expiry setting under the "Enable System-Generated Passwords Feature". There is not a work around to stop this from happening if you don't use that.
@liquidocelot make sure you're on 7.10 Beta if you're following this issue here.
If you have a similar problem on 7.9.x or 7.8.x then follow #4722
I'm on Version 7.10 beta-2
Try Beta3, I think there's a difference on the Settings screen so you can use the workaround like I did.
But what really intrigues me is why this is happening to us, it doesn't seem to happen to everybody...
Haha, just upgraded to beta 3 and it still doesn't have the setting. And now the whole thing is missing the majority of images and checkboxes.

You can try a Quick Repair and Rebuild, or deleting cache/themes. If the problem persists, or if it is appearing elsewhere in your system, I would say you have Linux permissions problems.
Just as an update, it seems this is in fact related to #4722 and the solution is to completely remove the SuitePImproved package from Module Loader.
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There is a work around.
This should get rid of the issue in the mean time.