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On Linguistics, where I am currently one of the moderators, I just received automatic Low Quality flags on two posts. Both posts have quality score -1 (typical scores are 0 - 100). These posts are anything but low quality, particularly that low, so it seems that Community is having a problem calculating post quality scores.

Example posts that Community has flagged recently include:

  • Linguistics: 1, 2
  • Unix & Linux: 1
  • Cross Validated: 1, 2, 3
  • Server Fault: 1
  • Programmers: 1, 2
  • Meta Programmers: 1
  • GIS: 1
  • Physics: 1! 2 3 4
  • Mi Yodeya: 1
  • Meta Stack Overflow: 1 2 3
  • Web Apps 1, 2
  • Academia 1, 2 (both from the same user)
  • TeX/LaTeX: 1, 2, 3 4

There have been reports from other sites as well (@ moderators from those sites: feel free to add your name here for reference).

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We have received four such (invalid) flags on stats and one on GIS. I have left three of the flags on stats untouched in case anyone would like to investigate further:…,…,…. NB: these flags are not vestiges of bad posts that have been edited. – whuber Nov 12 '12 at 21:24
One on SF too… – Iain Nov 12 '12 at 21:27
If you are referring to the low quality post queue, I think that some posts end up in there for demonstration purposes, so for example if someone flags that post as low quality the system will basically tell them that that they should pay more attention next time since it is not in fact low quality (more often you will see the reverse where a question that is poor quality and the reviewer says that its OK). – Jack Nov 12 '12 at 21:27
@Jack: These are automagic flags that mods get to see. – Iain Nov 12 '12 at 21:27
@Iain Thanks, added. :) – Alenanno Nov 12 '12 at 21:28
It's on Workplace too, pretty sure it's just all/most new answers coing in – Ben Brocka Nov 12 '12 at 21:29
Community is probably on a badge run for Marshal... – Yannis Nov 12 '12 at 21:32
@BenBrocka It's not all, I checked for that – Michael Mrozek Nov 12 '12 at 21:34
Probably ninja edits... – NullUserException อ_อ Nov 12 '12 at 21:48
Also on physics. This was flagged! Also the flags only show on the "moderator flags page", not on the affected posts. – dmckee Nov 12 '12 at 21:48
@NullUserExceptionอ_อ I'd believe that about one or two, but there seem to be a lot. – dmckee Nov 12 '12 at 21:49
@Null It's not the result of edits: every new answer (but not question) coming in is getting flagged. (I have been monitoring stats and GIS closely as a check.) Note, too, that a "-1" quality score is unprecedented: it takes a really awful answer to drop below 70 or so. – whuber Nov 12 '12 at 21:51
According to the SF blog new commits are pushed to meta and the rest of SE before SO, which implies, as this is not showing up on SO that it is a new commit. – ben is uǝq backwards Nov 12 '12 at 22:10
@Jack was referring to Review-beta: Obviously good answer in low-quality – Richard JP Le Guen Nov 12 '12 at 22:14
We just got flooded on Math.SE with 36 Community flagged "low quality" flags in the last hour. – robjohn Nov 12 '12 at 22:20
up vote 25 down vote accepted

It's my fault - ! is a tricky operator.

We'll be pushing a fix out now and cleaning up the flag queues.

My apologies to all moderators.

share|improve this answer
Could this be related to -…? – ChrisF Nov 12 '12 at 22:42
! is a tricky operator. No; it's not. – Ben Brocka Nov 12 '12 at 22:43
Note that this post has been automatically flagged as low-quality. – David Fullerton Nov 12 '12 at 23:00
@DavidFullerton I have no idea what you're talking about :P – Jarrod Dixon Nov 13 '12 at 1:23
You mean if (!!!!!x++) is tricky??? ;) – Shadow Wizard Nov 13 '12 at 12:03
Anyone who says ! isn't a tricky operator has never tried to coerce an arbitrary variable in javascript into a boolean (not that I'd recommend trying that). – Ben Lee Nov 15 '12 at 23:36

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