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For the guys having e85 start issues it's not likely related to the filter. On the Hydra we use secondary maps for e85 and there is a separate map to deal with the e85 maps during cold start. On the oem ecu you guys probably have only one map for cranking enrichment and you just need to add more.
Also turn the ignition on and wait about 3 seconds before cranking to pressurize the fuel rail again. If you have changed your fuel pump you may not have sealed the pump properly and your fuel system is not holding line pressure.
When my car was oem there were times even on pump fuel it wouldn't start first crank so, key on, wait 3, crank.
As for the fuel filter failure I really don't see this being related to E85 as it's really no worse as a solvent than pump fuel and I would bet additives in race fuel are worse. Typically the reason e85 is more corrosive is because it absorbs more water and it has a wicking or drying effect on some rubbers. The rubber issue is low concern as the oem rubber lines etc. on Japanese cars have proven up to the task over very long periods of use on the Suby and Mitsu crowd.
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