Crashes with free(): invalid pointer

[Cybah]

Binary package hint: xvidcap

Whenever I try to finish a capture in xvidcap, the program crashes with the following output...

$ xvidcap --codec flash_video --file cap.flv --audio no
*** glibc detected *** xvidcap: free(): invalid pointer: 0x0a111520 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb6ef13f4]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb6ef3456]
/usr/lib/i686/cmov/libavformat.so.52(url_fclose+0x24)[0xb763b584]
xvidcap[0x8054df4]
xvidcap(do_record_thread+0x23)[0x805bf03]
/lib/tls/i686/cmov/libpthread.so.0[0xb707a50f]
/lib/tls/i686/cmov/libc.so.6(clone+0x5e)[0xb6f637ee]

The full output including memory map, is attached.

Steps to reproduce:

1) Open xvidcap (same crash + backtrace with any video codec)
2) Press record
3) Press stop
4) *bang*

Ubuntu 8.10
xvidcap 1.1.6-0.1ubuntu3
libavcodec-unstripped-51 3:0.svn20080206-12ubuntu3+unstripped5
libavformat-unstripped-52 3:0.svn20080206-12ubuntu3+unstripped5