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In many posts with large LaTeX symbols, such as summation sigmas or the parentheses of a matrix, the upper part of those large symbols aren't displayed until you highlight them. If you then scroll them off the visible part of the page and then scroll back, they're messed up again. You should be able to see this if you open https://www.physicsforums.com/threads/matrix-representations-of-linear-transformations.694922/ for example. Parentheses of a 2x2 matrix seem to be especially vulnerable. I'll try it here
\begin{pmatrix}
1 & 2\\
3 & 4
\end{pmatrix} This isn't a PF 4.0 problem. It started about a week before the upgrade, when the LaTeX fonts were changed. (Everything got a little bit bigger).
Edit: The matrix above looks fine to me, when I just look at the page the usual way. But if I make the page small, and scroll down so that the matrix disappears up top, and then scroll down slowly, the parentheses are displayed incorrectly. If I scroll down fast, they look fine.
\begin{pmatrix}
1 & 2\\
3 & 4
\end{pmatrix} This isn't a PF 4.0 problem. It started about a week before the upgrade, when the LaTeX fonts were changed. (Everything got a little bit bigger).
Edit: The matrix above looks fine to me, when I just look at the page the usual way. But if I make the page small, and scroll down so that the matrix disappears up top, and then scroll down slowly, the parentheses are displayed incorrectly. If I scroll down fast, they look fine.
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