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Running 3.6.17, try to install 4.01, Mac says replace 3.6.17 with older version of firefox 4.01. Whats up... Mac PPC 10.5.8 THX

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Using Firefox 3.6.17 on PPC 10.5.8. Try and install 4.01 Firefox and it tells me it is a older version and to replace 3.6.17 with it. Just different is all so please let me know what will happen if I install 4.01 over 3.6.17.

Using Firefox 3.6.17 on PPC 10.5.8. Try and install 4.01 Firefox and it tells me it is a older version and to replace 3.6.17 with it. Just different is all so please let me know what will happen if I install 4.01 over 3.6.17.

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It is most likely caused by the timestamps of the files. Firefox 3.6.17 was probably build at a later time than Firefox 4.0.1 and that makes the OS think that 3.6.17 is a more recent version. You can ignore that warning.