heimdall 1.4.1 fails to upload a new kernel on SGS2 (i9100)
The issue is that when flashing the recovery to a Samsung Galaxy S2 (i9100) with heimdall ver. 1.4.1 on debian (amd64) in Virtualbox on windows 7 it is not possible to upload a kernel, download-pit works fine but the kernel upload aborts at 0% with 'Failed to send file part packet. When suggested to try with heimdall 1.4.0 the procedure completes properly.
This error was reported by user with nickname C-Keen on #replicant IRC channel.