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HASH_JOIN below was converted to nested loops...
HASH JOIN Cost: 14,544 Bytes: 142,476 Cardinality: 1,532
...be sure you gather fresh stats on all tables and indexes, also be sure you have gathered SYSTEM stats after upgrade.
If in doubt, first backup statistics just in case you have to go back.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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