Q: Mavericks resizes application windows and moves them around

Yes, still happening with the latest OSX version.

Happening for me too with 10.9.1. I lock the screen using Alfred and when I unlock, Chrome and Chrome Canary are about 200px high at the top of the screen and transparent. I can see their tab bar, window edge and  shadow, but the content area is transparent. If I try to rezise or move the window, it just snaps back to the same position. I have to close the application and restart it. Very annoying and not reproducible!

Mailplane does this too, but the window is nowhere to be seen.

Here's a screenshot of what it looks like when I drag one of the windows down. When I let up, it will go back to the top right.

Same problem here. Generally not a huge deal to quit the app and re-open it. Doesn't happen all the time. Must be some suspect app that my wife uses in her account that causes the issue. But when I have a bunch of encodes running in a queue, hate to stop it.

Same problem on my mac mini (md387) after upgrade to mavericks. Windows resize to small and sticks to top of screen after logging in

Glad to know it's not just me. Having the same problem, very annoying!

Just noticed other users comment that this is happening and part of an Alfred workflow. I know that is just calling the system default function for Lock but could this be a contributing shared factor?

nope I do not have alfred installed and it does hapen to me all the time! (is use the hide/show dock to partly unlock the windows)

Happening to me also. Mac mini on a modern LCD display. Symptoms just as reported above. Started just after update to Mavericks.

Very annoying!

I went back to using (trying) Outlook with latest updates to Mavericks because the Mail app from Apple does not work with my GMAIL accounts... even after all of their updates to address the known problems.  Since I could not sync my GMAL accounts, I went back to using Outlook 2011 again to see what it did, and it sync'd without any issues.  Then of course I ran into this problem as reported in this thread. 

Good grief, this Mavericks update has sure made using the MAC a royal pain in the rear to use for email...

I am surprised at the failures here by Apple, and that these issues haven't been resolved yet.  Normally, the MAC updates have been flawless; Mavericks has for me been kind of a disaster because of the email problems!  I have advised all of my friends and family to avoid it, at least for now if they use gmail accounts.

I've not encountered any of the issues you guys have had. Maybe it has something to do with my using a new MBP with retina display? I'm using it at 1680x1050 vs the default 1440x900.

I´ve had those windows issues, too, since using Mavericks on my Mini.

I think I found the solution on another thread: https://discussions.apple.com/message/23632225#23632225

At least for me it worked perfectly... NO MORE windows issues!

And it´s so incredibly simple: perform a SafeMode Boot: just restart your Mac and press and hold the SHIFT key immediately after the startup chime. Then wait until you see a progress bar on your screen and release the shift key. Please be patient, though, as rebooting in SafeMode will take MUCH longer than normal boots.

What this procedure does is simply, amongst others, deleting certain cache files created during system upgrades (please refer to Apple´s SafeMode explanations found elsewhere).

For me this also fixed a minor BT issue starting after updating to 10.9.1.

So it´s highly recommended

Once the Mac has finished booting in SafeMode just restart it in "normal" mode, and you should be done!

Afterwards I did something else perfectly curing my "slow" Mini, gotten slower after each system upgrade: I deleted the database Launch Services and Dyld`s Shared Cache with ONYX. I do recommend deleting other system cache files with ONYX as well...

Now my Mac is just as fast and reacts even better - due to Maverick´s improved RAM mangagement - as it was after purchasing it. NO MORE ISSUES so far.

Hope this helps!

Thank you for your insight and remedy which I also think is correct as it would appear that the problem is gone (hopefully) here on MY mini after running the program "CleanMyMac-2" which cleans the caches as well as quite a few other things. (It actually freed up quite a few Gigabytes!) This seems to be a more efficient program than "MacKeeper". I have no experience with "Onyx". I can imagine that upgrading operating systems could lead to residual and redundant caches.

Boot up in save mode did the job for me, thanks!

Glad i could help!

The safe mode seemed to cure one problem (cool!) related to the funky windows / resizing in Outlook for me... that is, returning to the computer from sleep now works (no stuck window size in Outlook), but I found if you SWITCH USERS (where each is using their own Outlook profile) the problem with the stuck window size in Outlook caused by Mavericks is still present. 

Some background: this is my wife's iMac (2008 era) and I am the admin guy; when we are both logged in and switch users to our own respective accounts, the problem returns.  So short hack, I should not share the mac!  :-\

FYI - the Alt-Command-D suggestion (do it twice) to reset the dock, also seems to temporarily cure the stuck window size, but the fastest (most logical?) method for me is to simply quit Outlook and then restart it.

No matter what, Apple still has an issue here I believe in Mavericks.