## 2.6.1 – Changes 

Stability SERVER-13739 582 Repair database failure can delete database files 

## Build and Packaging 

• SERVER-13287 583 Addition of debug symbols has doubled compile time 

• SERVER-13563 584 Upgrading from 2.4.x to 2.6.0 via yum clobbers configuration file 

• SERVER-13691 585 yum and apt “stable” repositories contain release candidate 2.6.1-rc0 packages 

• SERVER-13515 586 Cannot install MongoDB as a service on Windows 

## Querying 

• SERVER-13066 587 Negations over multikey fields do not use index 

• SERVER-13495 588 Concurrent GETMORE and KILLCURSORS operations can cause race condition and server crash 

• SERVER-13503 589 The $where operator should not be allowed under $elemMatch 

• SERVER-13537 590 Large skip and and limit values can cause crash in blocking sort stage 

• SERVER-13557 591 Incorrect negation of $elemMatch value in 2.6 

• SERVER-13562 592 Queries that use tailable cursors do not stream results if skip() is applied 

• SERVER-13566 593 Using the OplogReplay flag with extra predicates can yield incorrect results 

• SERVER-13611 594 Missing sort order for compound index leads to unnecessary in-memory sort 

• SERVER-13618 595 Optimization for sorted $in queries not applied to reverse sort order 

• SERVER-13661 596 Increase the maximum allowed depth of query objects 

• SERVER-13664 597 Query with $elemMatch using a compound multikey index can generate incorrect results 

• SERVER-13677 598 Query planner should traverse through $all while handling $elemMatch object predicates 

• SERVER-13766 599 Dropping index or collection while $or query is yielding triggers fatal assertion 

