On a collaborative document, author coloring is incorrect

Binary package hint: abiword

If I have a collaborative document, and it has text like this:

"...ability to decode letters..." and I want to insert a comma, and I do it by selecting a space (sweeping it out) and then typing comma, like so:
"...ability to decode_letters..." (Here an underscore substitutes for the selected region.)
"...ability to decode,letters..."
then you find that the entire string "decode,letters" has my author color, rather than just the comma.

All I added was the comma, and I get credit for the two neighboring words.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: abiword 2.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-23.37-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic x86_64
Architecture: amd64
Date: Tue Nov 9 14:47:36 2010
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: abiword