Thanks so much for posting a solution!

Merge to .com can take a while, as we try to shake out any kinks first and then merge the code.

I couldn't resize on an empty post before. But what I did (and what worked now) was that I opened an old post, resized the window to my preferred size, saved that post, and then when I opened New Post the post editor window remained at the desired size.

Thanks to all the respondents to this thread.

Happy to see that it has been fixed (kind of) on wordpress.org.

How long does it typically take for wordpress.org changes to be transferred to wordpress.com?

Thanks.

Thanks for letting us know - we are aware of this issue. You don't need to bump the thread up once it's modlooked (and that actually makes it appear "newer" to us, and we start with the older threads).

This is being addressed and the targeted release is the next upgrade of the software. I'm very sorry this is happening to you, and I hope that we can have everything ready to go soon!

Something that has worked for other users is to start a draft, resize the textbox, then save the draft and close it.

You may want to try clearing your browser of all cookies and cache as well. Here is more information about how to do that:
http://en.support.wordpress.com/browser-issues/

So far, when these solutions work for users, they are temporary, but it may help a little.

Thank you for your patience!

Thanks for the help with these, TT.

I was not aware it was affecting other WP.com users, as I had not seen any other threads about it (and I did search before posting).

I was just concerned that this issue might get lost among the continuous stream of new posts - hope you understand. Now that you have explained it's a system-wide problem I will stop bumping this topic and eagerly await the next upgrade.

Incidentally...

The problem still exists that the post editor window is forced to 5000 pixels tall because the wp_usermeta -> wp_user-settings -> ed_size value is being set to ed_size=310566666&editor=tinymce&mfold=f or other extremely large value with FireFox 17.0.1 and Chrome 23.0.1271.97 m.

You can add Internet Explorer 10 to this list as well.

But when I clicked "Update", there began a major inconvenience.

Now, whenever I open a New Post or Edit Post, the textbox immediately expands down to its maximum length. You then have to manually make it smaller to put it back at a manageable length.

Probably is that whenever I open up the screen again, it continues automatically expanding the textbox to its maximum length.

How do I fix this? Thanks.