Microsoft released new cumulative updates for SQL Server. 

SQL Server 2008 R2 Service Pack 1 Cumulative Update # 10

• KB Article:  KB #2783135
• 16 fixes are listed at the time of publication
• Build number is 10.50.2868
• Relevant for @@VERSION 10.50.2500 through 10.50.2867

SQL Server 2008 R2 Service Pack 2 Cumulative Update # 4

• KB Article: KB #2777358
• 34 fixes are listed at time of publication
• Build number is 10.50.4270
• Relevant for @@VERSION 10.50.4000 through 10.50.4269

My usual disclaimer: these updates are NOT for SQL Server 2008. Only apply to systems where @@VERSION returns 10.50.xxxx, where xxxx is >= 2500. If xxxx < 2500, you need to start thinking about getting off the RTM branch.