We recently deployed SQL Server 2012 Standard on a Server 2008 R2 SP1 machine and, for the most part, everything behaves the same as SQL 2008 R2 (no surprise there). However, one issue I've been experiencing is that the transaction logs will not automatically shrink like they do in SQL 2008 R2. The database recovery model is set to full, and we have full backups running weekly and transaction log backups running every 12 hours. The transaction log backups work fine, but the files themselves never shrink. Autoshrink is set to true. If I manually run a shrink operation on the transaction log files, it works like a charm - it just shrank the 29GB file down to 3GB. Why does the transaction log not automatically shrink anymore?
Microsoft SQL Server 2012 - 11.0.2100.60 (X64)
Windows Server 2008 R2 SP1 (Build 7601: Service Pack 1)