Xperia Z1 Compact M51w sees the 14.2.A.1.146 firmware update

The Chinese version of Sony Xperia Z1 Compact (M51w) is now seeing its first update. The 14.2.A.1.146 firmware build number is likely to be Chinese-exclusive, replacing the 14.2.A.1.142 firmware in the international model.

Like the 14.2.A.1.142 firmware update, no changelog was present so is likely to be the bug-fixing update (nope, still Android 4.3). You can also get the FTF file of this FW here (password: 7jm7).

Via