In Jupyter notebook 5.0 I now see slightly annoying behavior of horizontal scroll bar in single line cells where scroll bar overshadows cell text and is hard to edit.

Example shown in image above
Is that in Chrome? It looks similar to an issue that's cropped up occasionally for ages. :disappointed:
Noooo, not this bug again!
@nickgravish what browser version and OS version? Do you have a high-DPI display and/or multiple displays or switching between a laptop and external monitor? If this is macOS, what's the value for System Preferences > General > Show scroll bars?
Sorry to be bearer of bad news. The behavior is in chrome on both a high-dpi and regular monitor.
More info (also sorry didn't note in original post):
imac 5k in retina mode
Have a second display (Dell 2415Q)
OS Sierra 10.12.3
Chrome v 57.0.2987.133

As a follow up, when I change the scroll bar behavior in OS to Always, padding is added to bottom of cell an problem goes away.
Below is image with scroll bar set to always.

That being said, would like to only show scroll bars when necessary.
Has there been any progress on this? I experience a similar issue where the horizontal scroll bar remains despite removing the cursor from the cell. The only way to get rid of the scroll bar is to cut and repaste the cell.
This happens for both single line cells and multiple lines, but I thought it may be related.
I am on Mac and Chrome, with the "Automatic" setting for "Show scroll bars".
I get this issue as well, Macbook Air 2013, OSX 10.13.6
Seems that refreshing the window returns behavior to normal, I'm trying to figure out what scenarios I encounter the problem.
Same here, Mac OS 10.14.2, Google Chrome 71.0.3578.98, "Show scroll bars" in system settings set to auto.
Same here, Mac OS 10.13.6, Version 71.0.3578.98 (Official Build) (64-bit)
It isn't very clear based a typo from previous comments. This is actually an issue with Mac OS using Chrome as the default browser. You will need to go into setting in the Mac OS. Settings -> General -> Show Scroll bars This will resolve the issue.

This is really annoying me.
Your answer didn't solve the issue. My macbook is using Mac OS X 10.14.4 and Google Chrome 73.0.3683.103.
This is also happening to me with Mac OSX 10.12.6 with Google Chrome Version 73.0.3683.103 (Official Build) (64-bit). The last row of Jupyter cells were very difficult to click on, because the scroll bar went over the text. Changing the "Show scroll bars" setting from "Automatic" to "When scrolling" solved the problem for me, as now the scroll bar disappears and is only visible when scrolling.
Experiencing the same bug in Opera 62. Seems to be a general Chromium issue.
Happening to me in Firefox too, also a Mac
Also experiencing this in FIrefox, Mac 10.13.6
Is there any progress on this? This is a really bad experience.
Selecting Always from the settings for show scroll bars worked for me
Now I there is some padding between cell text and the scroll bar

Most helpful comment
As a follow up, when I change the scroll bar behavior in OS to Always, padding is added to bottom of cell an problem goes away.
Below is image with scroll bar set to always.
That being said, would like to only show scroll bars when necessary.