One of the more ironic permissions issues in OS X Jaguar is when the permissions of the Disk Utility application itself become corrupted. This can prevent you from being able to use Disk Utility's "Repair Permissions" tab to repair the permissions on your disk, including those of the Disk Utility application itself. Repair Disk Utility's Permissions can fix this corruption which would result in the following type of "Operation not permitted" errors reported in the Repair Permissions' progress window: User differs on ./Applications, should be 0, owner is 501
Group differs on ./Applications, should be 80, group is 99
Owner and group not corrected on ./Applications, reason Operation not permitted
Permissions not corrected on ./Applications, reason Operation not permitted

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Clock your connection speed By Mark Sweeney, PC Magazine. Is your ISP delivering on its promises of fast Internet connectivity? Use NetPerSec to call its bluff. How fast is your Internet connection, really? Providers of the various types of connections promise different communication speeds, but are you actually getting what you've been promised? Depending on network traffic, actual speeds can be slower. Cable modems are fast-as long as not too many of your neighbors are sharing the line-but can slow considerably...

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