I just uploaded the seventh beta of XITS scientific fonts (don't let the beta label mislead you ;) it is quite functional). No bug changes, just few bug fixes and small additions:
- Add TopAccentHorizontal position to U+00B7, U+0131, U+0237, U+203E, U+22C5 - Add spaces and control characters U+0000-001F, U+2000-200F, U+2028-202F - Tune script positioning for display integrals - Disable smaller that text size integrals - Rename fj ligature glyph to "f_j" for PDF search - Assign un-encoded glyphs PUA code points - Use U+23B7 slot for the glyph uni221A.base - Change integral glyphs name suffixes to "small" and "display"
Get it from the usual place.
Update: The new release is also available through TeXLive updates.