Over 600MB of updates???

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http://forums.opensuse.org – I recently tried to install Thunderbird direct from Yast2 via search and over 800MB of updates are automatically downloaded, along with Thunderbird. I am using 11.2RC2. Is it normal for the following updates to be included?? openSuse-11.2-Oss 694.09MB Packages=166 Medium 1 552.63MB Packages=160 openSuse-11.2-update Medium 1 88.38 Packages=2 Is this CORRECT?? (Distributions)