I posted this answer a few minutes ago. After the display, I had written $\int_E f\\,d\mu$
to get the thin space; the previewer parsed it correctly (and parsed it incorrectly without the double backslash, displaying the comma instead). After I saved, if I had \\,
then the post complained of a misplaced \\
and did not display the formula; if I had the single backslash, \,
, then it displayed correctly.
In other words, the previewer was doing one thing, while the final display was doing another.
\\{
which displayed correctly in the previewer, but led to complaints after it was saved; removing the double backslash led to incorrect display in the previewer, correct when saved. $\endgroup$ – Arturo Magidin Nov 11 '10 at 6:18$
. $\endgroup$ – Isaac Nov 11 '10 at 6:56$$
. I have no objection to settling on either behaviour, but the fact that the preview and the server are behaving differently is a definite problem. $\endgroup$ – Arturo Magidin Nov 11 '10 at 15:53