[NOTE: Allegedly, kernel 2.0.37pre12 includes the fix]
Thanks for reading this. You'll be pleased you did, if you have a version 2.0
Linux kernel! Up to and including kernel 2.0.37pre10 seem to have a bug with
multithreaded programs under certain conditions.
This is important because as of ftpgrab-0.0.5a, ftpgrab uses the pthreads
threading library to achieve concurrent downloads.
The kernel bug manifests itself with an "oops" and often messages saying
"VFS: Close: file count is 0". Sometimes processes other than ftpgrab
itself may be caused to "oops". This is unfortunate.
Kernel series 2.2 does not appear affected by this nasty bug. As a
workaround for 2.0, either use ftpgrab-0.0.4a which is pretty functional
and does not use threads, or perhaps try limiting ftpgrab to a single
child thread with "-t 1" as a command line parameter. I'd be surprised if
the latter measure helper much though!