Some namespaces, interfaces and classes in Predis v0.8 have been renamed to follow a common rule inspired by the naming conventions adopted by the Symfony2 project. This is a list of all the changes:
Predis\Network
=>Predis\Connection
Predis\Profiles
=>Predis\Profile
Predis\Iterators
=>Predis\Iterator
Predis\Options
=>Predis\Option
Predis\Commands
=>Predis\Command
Predis\Commands\Processors
=>Predis\Command\Processor
Predis\IReplyObject
=>Predis\ResponseObjectInterface
Predis\IRedisServerError
=>Predis\ResponseErrorInterface
Predis\Options\IOption
=>Predis\Option\OptionInterface
Predis\Options\IClientOptions
=>Predis\Option\ClientOptionsInterface
Predis\Profile\IServerProfile
=>Predis\Profile\ServerProfileInterface
Predis\Pipeline\IPipelineExecutor
=>Predis\Pipeline\PipelineExecutorInterface
Predis\Distribution\INodeKeyGenerator
=>Predis\Distribution\HashGeneratorInterface
Predis\Distribution\IDistributionStrategy
=>Predis\Distribution\DistributionStrategyInterface
Predis\Protocol\IProtocolProcessor
=>Predis\Protocol\ProtocolInterface
Predis\Protocol\IResponseReader
=>Predis\Protocol\ResponseReaderInterface
Predis\Protocol\IResponseHandler
=>Predis\Protocol\ResponseHandlerInterface
Predis\Protocol\ICommandSerializer
=>Predis\Protocol\CommandSerializerInterface
Predis\Protocol\IComposableProtocolProcessor
=>Predis\Protocol\ComposableProtocolInterface
Predis\Network\IConnection
=>Predis\Connection\ConnectionInterface
Predis\Network\IConnectionSingle
=>Predis\Connection\SingleConnectionInterface
Predis\Network\IConnectionComposable
=>Predis\Connection\ComposableConnectionInterface
Predis\Network\IConnectionCluster
=>Predis\Connection\ClusterConnectionInterface
Predis\Network\IConnectionReplication
=>Predis\Connection\ReplicationConnectionInterface
Predis\Commands\ICommand
=>Predis\Command\CommandInterface
Predis\Commands\IPrefixable
=>Predis\Command\PrefixableCommandInterface
Predis\Command\Processor\ICommandProcessor
=>Predis\Command\Processor\CommandProcessorInterface
Predis\Command\Processor\ICommandProcessorChain
=>Predis\Command\Processor\CommandProcessorChainInterface
Predis\Command\Processor\IProcessingSupport
=>Predis\Command\Processor\CommandProcessingInterface
Predis\Commands\Command
=>Predis\Command\AbstractCommand
Predis\Network\ConnectionBase
=>Predis\Connection\AbstractConnection
Predis\MonitorContext
=>Predis\Monitor\MonitorContext
Predis\ConnectionParameters
=>Predis\Connection\ConnectionParameters
Predis\ConnectionParametersInterface
=>Predis\Connection\ConnectionParametersInterface
Predis\ConnectionFactory
=>Predis\Connection\ConnectionFactory
Predis\ConnectionFactoryInterface
=>Predis\Connection\ConnectionFactoryInterface