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Issues with FLV file when Blob Cache is enabled

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Noticed this issue yesterday. Although this has been fixed with KB961749 - https://support.microsoft.com/?id=961749, there may be requirements wherein the update/patch cannot be applied and hence requires a workaround.

There are two possible workarounds, the first of which is to disable Blog Cache(not a good workaround :-) ). This can affect performance of other file types.

The second option is to modify the web.config file. The entry <BlobCache location="C:\blob" path="\.(gif|jpg|png|css|js|flv)$" maxSize="200"  can be modified to remove the file extension type of “flv”. So basically we are telling SharePoint to disable Blob Caching for files with extension .flv