[RCD] Problem with attachments over 90kb only in ie7

I'm using trunk rev.764 over an https connection. There is no problem uploading attachments from firefox, ie6 and safari, everything works fine. With ie7 there's no way to upload nothing biffer than 90Kb (maybe less), I tried it in two different computers emptying cache and all than. The server is the same in both cases.

PS: The same thing happens with horde in the same server. The php.ini settings related ...

post_max_size = 20M max_execution_time = 30 max_input_time = 60 memory_limit = 40M

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