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When a resource is fetched and leads to an HTTP error, the size of the HTTP error response received appears in the page size table. That is correct, but misleading: an image can then be reported with a size of a few hundred bytes when its actual size could be more than 100Kb. Todo: flag these sizes somehow so that users may understand the situation.
These sizes are now flagged with an asterisk. A legend follows the table to explain what the asterisk means. Note that, if the request for erratum is handled by the group is approved: http://lists.w3.org/Archives/Public/public-bpwg/2010May/0000.html the message should only be displayed when the resource under test could not be retrieved (i.e. when the tests are run against the error page itself). In that case, there is already a big global warning that alerts the user that the mobileOK Checker is probably doing something that he doesn't expect...