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