Here is a breakdown explaining what is included:
New Items
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PrecisionPOP
Sitromba Dialer
Updated Items
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Buddylinks
CoolWebSearch
SaveNow
TIB Browser
Winpup32
After updating, the detail-screen shows the following information:
Reference Number : 01R259 18.02.2004
Internal build : 186
Total size : 872669 Bytes
Signature data size : 856405 Bytes
Reference data size : 16200 Bytes
Signatures total : 19389
Target categories : 10
Target families : 426

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic