Can you provide a URL or HTML file demonstrating this issue?

I'd think most vBulletin 4 forums would have the issue. I know forums.hockeyinformer.com does.

Unable to reproduce the issue on Windows 7,Mac 10.12.2 & Ubuntu 14.04 using chrome stable-	56.0.2924.87 & latest Canary-58.0.3024.0.
1.Able to enter text with spaces after logging into facebook in the below URL (As per comment#0)
https://www.vbulletin.com/forum/forum/vbulletin-4/vbulletin-4-questions-problems-and-troubleshooting/4356452-space-bar-not-working-on-reply/page3
2. Unable to enter quote in the below URl even after login with valid credentials:(as per comment#2)
forums.hockeyinformer.com

Please find the attached screencast and let us know if we miss any steps to reproduce the issue.If possible please provide us the exact URL where you observed the issue.
Thaks you.

Deleted: 694625.mp4 3.2 MB

	694625.mp4 3.2 MB View Download

Sorry. Hockeyinformer restricts new users from posting by default. I've had the mods there activate your account. Please try again.

I don't believe anyone on that link in comment#0 mentioned Facebook was a problem. The issue appears in (at least some) vBulletin 4-based forums.

I've also noticed that the no spaces issue only seems to affect the default line that quoting a post puts you on. After typing a newline, spaces can be added.

Thank you for providing feedback. removing "Needs-Feedback" label.

Thanks for your reply.
As per comment#7,you gave access permissions to my account which is observed in above screencast.
Now we are unable to login 'forums.hockeyinformer.com' with same valid credentials on windows 7 using stable-56.0.2924.87 & latest Canary-58.0.3027.0.
It would be more helpful to triage this issue ,if you provide us the sample credentials which has permissions to post in "forums.hockeyinformer.com"

Please confirm is this chrome specific issue?

Yes, this is a Chrome-specific issue. Or at least it does not affect Firefox, IE, or Edge.

To confirm, you're saying the credentials you set up when you made the account at Hockeyinformer no longer work? Were you also unable to reset your password?

Are you asking me to get a new account created and post the credentials on this bug?

Thank you for providing more feedback. Adding requester "jmukthavaram@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Able to reproduce the issue on windows7, Mac 10.12.3 and Linux Ubuntu:14.04 using Chrome stable (56.0.2924.87),beta (57.0.2987.88) .
But this is working fine canary(58.0.3028.0). Seems the issue got fixed on later versions. Worked on reverse bisect and below is the info:
Manual Bisect:
------------
Good— 58.0.3008.0—Revision—449509
Bad - 58.0.3007.0—Revision—449173

Per-revision-Bisect Tool Info:
----------------
You are probably looking for a change made after 449250 (known good), but no later than 449251 (first known bad).
CHANGELOG URL:
The script might not always return single CL as suspectas some perf builds might get missing due to failure.
https://chromium.googlesource.com/chromium/src/+log/cbcac91f7fe895372f95f5344a73445adf65dcde..5b9a9a6f8c9c646ac542a9e1a2f18c59140849e6

Possible suspect:
----------------
https://chromium.googlesource.com/chromium/src/+/5b9a9a6f8c9c646ac542a9e1a2f18c59140849e6

joone.hur@ Could you please look into this issue & Please reassign if this is not related to your change.
Thanks!!

Able to reproduce the issue on mac os 10.12.2 using chrome stable M57 #57.0.2987.110 .

@joone-- Could you please take a look into this and provide us an update.

Thanks!

Mark WontFix, since 58.0.3008 works as expected regarding #c12.