Mass storage transfer speeds and 4GB SDHC card

I got a new 4GB SanDisk Micro SDHC to use with my Nokia N95. The transfer times using USB mass storage are horrific (USB 1.0 or worse I think). For example, it takes 9 minutes to delete 280MB worth of maps off the card. Another example is scanning for the Music Library - it used to be almost instantaneous, but now the songs are found so slow I can see each and every single number change.
Is this happening because SDHC is not officially supported by the firmware? The card is recognized just fine, but it is just slow in every way imaginable.

Just found out that regular MicroSD is FAT16, while MicroSD SDHC is FAT32. Anyone think that the support for FAT32 is either broken or crippled or not officially supported by the firmware?
I am really bummed out. I love the high capacity, but it is just so excruciatingly slow. I guess I could get a card reader, but I'd much rather not have to take out the card everytime I want to put lots of data on it.
So what has everyone else's experience been with transfer speeds on the N95?

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