My router seems to be blocking some packets to Avast servers

My router seems to be blocking some packets to Avast servers. Does it matter? Do I need to do anything?

Examples

2013-03-17 23:30:27 Local0.Warning 192.168.0.1 TCP Packet - Source:192.168.0.11,65051 Destination:77.234.44.55,80 - [BLOCK]

2013-03-15 11:03:05 Local0.Warning 192.168.0.1 TCP Packet - Source:192.168.0.10,1598 Destination:r-056-041-234-077.ff.avast.com,80 - [BLOCK]