# Header sometimes not sticking to the top of the page
**URL:** https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469
**Category:** Bug
**Created:** [27.Январь.2015 00:27:20 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469 "2015-01-27T00:27:20Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@mcwumbly](https://meta.discourse.org/u/mcwumbly)
#### Post date: [27.Январь.2015 00:27:20 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/1 "2015-01-27T00:27:20Z")
Continuing the discussion from [The end of Clown Vomit, or, simplified category styles](https://meta.discourse.org/t/the-end-of-clown-vomit-or-simplified-category-styles/24249/109):
> [@cpradio](#):
>
> Why is the header no longer sticking to the top of the page when scrolling through a topic?
I saw this once today too… not sure how to reproduce though…
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### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [27.Январь.2015 00:28:07 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/2 "2015-01-27T00:28:07Z")
Not sure, but its happening to me right now 😉
Not sure what (if anything) I did special… drats. Hard refresh fixed it.
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### Author:  [@sam](https://meta.discourse.org/u/sam)
#### Post date: [27.Январь.2015 01:02:39 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/3 "2015-01-27T01:02:39Z")
Confirmed here … lets see if I can repro
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### Author:  [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [27.Январь.2015 01:11:50 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/4 "2015-01-27T01:11:50Z")
Yeah I get this now too, it’s always on navigation to another topic via Suggested Topics. Very odd.
My _guess_ is we have invalid HTML in there somewhere, somehow?
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### Author:  [@mcwumbly](https://meta.discourse.org/u/mcwumbly)
#### Post date: [27.Январь.2015 01:21:29 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/5 "2015-01-27T01:21:29Z")
Happening on mobile too.
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### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [27.Январь.2015 01:26:47 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/6 "2015-01-27T01:26:47Z")
> [@codinghorror](#):
>
> Yeah I get this now too, it’s always on navigation to another topic via Suggested Topics. Very odd.
Yes, that may be it. I’ve been trying a dozen things since I originally got it to happen and I forgot that I was primarily browsing from Suggested Topics initially (I surprisingly, don’t do that very often, just when I’m in a hurry).
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### Author:  [@sam](https://meta.discourse.org/u/sam)
#### Post date: [27.Январь.2015 02:56:52 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/7 "2015-01-27T02:56:52Z")
I just reverted a change with categories that may have been causing it, oddly enough code looks good, but this could be a jQuery bug or something.
Very hard to debug cause I can not get a local repro:
[https://github.com/discourse/discourse/commit/d52b0a2458ca1cb19aa1442c0703ff39ee05ff1d](https://github.com/discourse/discourse/commit/d52b0a2458ca1cb19aa1442c0703ff39ee05ff1d)
cc @zogstrip
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### Author:  [@Mittineague](https://meta.discourse.org/u/Mittineague)
#### Post date: [27.Январь.2015 04:31:42 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/8 "2015-01-27T04:31:42Z")
I did experience the non-sticky header earlier today but whatever you did seems to have fixed it, unless it’s just coincidence. Darn no-repo sporadic bugs are the bane!
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### Author:  [@sam](https://meta.discourse.org/u/sam)
#### Post date: [27.Январь.2015 04:38:50 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/9 "2015-01-27T04:38:50Z")
It was happening to me quite consistently in production (but not in dev) before I hacked out that code.
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### Author:  [@zogstrip](https://meta.discourse.org/u/zogstrip)
#### Post date: [28.Январь.2015 00:25:17 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/10 "2015-01-28T00:25:17Z")
Like @sam I could not reproduce locally… I changed the regexp and deployed the change here. Haven’t heard a single complaint since, so I’m guessing it’s working fine now 🐋
[https://github.com/discourse/discourse/commit/b003c2b4f3181cd6ff13623117bbdba7caaad847](https://github.com/discourse/discourse/commit/b003c2b4f3181cd6ff13623117bbdba7caaad847)
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### Author:  [@DeanMarkTaylor](https://meta.discourse.org/u/DeanMarkTaylor)
#### Post date: [28.Январь.2015 01:20:37 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/11 "2015-01-28T01:20:37Z")
The reason it didn’t work is because using a `\b` in a “character class” is a “backspace” and `[^\b]` is equivalent to saying:
```
Match any character that is NOT the backspace character (ASCII 8)
```
Original regex for reference: `\bcategory-[^\b]+`
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### Author:  [@zogstrip](https://meta.discourse.org/u/zogstrip)
#### Post date: [28.Январь.2015 08:29:16 UTC](https://meta.discourse.org/t/header-sometimes-not-sticking-to-the-top-of-the-page/24469/12 "2015-01-28T08:29:16Z")