Bug introduced in 10.0.1 or 10.0.2 and fixed in 10.1.0
In version 10, if we plot with Sqrt
in y-axis, and export to PDF, the square root disappears in the PDF file.
p = Plot[x, {x, 0, 1}, Frame -> True,
FrameLabel -> {"x", "\!\(\*SqrtBox[\(y\)]\)"}]
Export["test.pdf", p];
This does not happen in version 9.