# Vertical lines in array not appearing (Chrome)

On the main site, in Google Chrome, the vertical lines of an array made in $\LaTeX$ do not appear. They appear in meta, but not on the main site. Here is a latex array: $$\left[\begin{array}{c|c|c|c} 1 & 2 & 3 & 4 \\ 5 & 6 & 7 & 8 \\ 9 & 10 & 11 & 12 \end{array}\right]$$ with the coding

$$\left[\begin{array}{c|c|c|c} 1 & 2 & 3 & 4 \\ 5 & 6 & 7 & 8 \\ 9 & 10 & 11 & 12 \end{array}\right]$$

And a screenshot of the same code in the question editor on the main site:

Another example: This answer appears as follows for me:

The vertical lines always appear using Internet Explorer, even on the main site.

• It's rendering fine for me (Chrome 42.0.2311.90 under Windows 8.1). – user642796 Apr 27 '15 at 9:22
• It's weird, at first I didn't see them but they eventually appeared (chrome, windows 8). If you wait do they eventually show up? – Najib Idrissi Apr 27 '15 at 9:36
• @NajibIdrissi No – ahorn Apr 27 '15 at 9:38
• @ArthurFischer I am using version 42.0.2311.90 m in desktop mode in Windows 8.1 – ahorn Apr 27 '15 at 9:39
• Rendering on FF 37, Ubuntu. – apnorton Apr 27 '15 at 20:21
• Everything is good on Chrome 42.0.2311.90 under OSX 10.10.1 – Surb Apr 27 '15 at 22:22