There has been several security vulnerabilities fixed today!
Also I have this problem:
2400K .......... .......... .......... .......... .......... 96% 1.23 MB/s
2450K .......... .......... .......... .......... .......... 98% 657.14 KB/s
2500K .......... .......... .......... .......... ....... 100% 3.79 MB/s
15:24:01 (970.67 KB/s) - `./install_flash_player_9_linux.tar.gz' saved
[2608602/2608602]
Download done.
md5sum mismatch install_flash_player_9_linux.tar.gz
The Flash plugin is NOT installed.
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