The Exchange Team released Rollup 1 for Exchange 2010 SP3.
After installation of Rollup 1 you will get version 14.3.146.0
Rollup 1 for Exchange 2010 SP3 is available for download from:
Update Rollup 1 for Exchange Server 2010 Service Pack 3 (KB2803727)
Full details for this release you can find here:
Description of Update Rollup 1 for Exchange Server 2010 Service Pack 3
Issues resolved by Rollup 1:
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