Support the JDBC DatabaseMetaData#getClientInfoProperties() method, in the sense of returning an empty result, in order to make Websphere happy.

Query Statistics: new feature which stores the newest 100 SQL queries executed and their performance data.
Useful for tracking down badly performing queries.

MVStore table engine: new setting "retention_time" to configure the time to retain old data. The default is 45 seconds.

Session-temporary LOB's could sometimes accumulate, increasing the size of the DB file until shutdown.
Now they are cleared out at every commit.

contains extra information to make it possible for smart editors to do autocomplete.
Patch from Nicolas Fortin.

rename the newly introduced UNDO_LOG_SIZE column to CONTAINS_UNCOMMITTED, because that is more reliable than the size of the undo log

For read-only databases, for the trace level "debug", the trace info is written to the temp directory.

sessions are creating large transactions.

When running the Recover tool on very large (>6G) databases, some statistics were reported with negative numbers.

Queries "group by" that contain a subquery with an aggregate function returned the wrong result in some cases.

New feature from Davide Cavestro - allow using custom Java object serialization engines on a per-DB basis.

when the search key was a different cardinal type from the table index key.
e.g. where the one was INT and the other was LONG

Issue 467: OSGi Class Loader (ability to create reference to class in other ClassLoader, for example in another OSGi bundle).

Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.