There is a bug in FLTK that causes vncviewer on Windows to crash when it receives clipboard data containing CRLF line endings. The problem is a bad for loop that causes buffer overflows.
 These are technically a RFB protocol violation, but we are not filtering or enforcing this properly
Verified that chavez builds out client with fltk-1.3.3-8
Verified that i could reproduce the crash with 4.6.0 client and that it clipboard is working as expected using build 5208 on the windows platform.