WoWRoster v1.7.3 fixes this issue
Starting wow 2.0.3 people have reported all kinds of update errors. I have identified the source for this problem: blizzard has slightly changed the savedvariables format. This is enough to trip up our parser in some situations.
I'm working on it.
EDIT:
The source of the problem is that blizzard slightly changed the format for the savedvariables.lua. Not by much, but enough to break our lua parser. I've attached an updated version.
Some additional data validity checks were also necessary. This fixes the quest insert errors people were getting even with the new parser.
To install, rename the file luaparser.txt to luaparser.php and upload it to your roster/lib/ directory (overwriting the file that's already there).
Rename the file wowdb.txt to wowdb.php, and upload it to your roster/lib/ directory as well (again overwriting the existing file).
EDIT 2:
These files have been released as a hotfix. They can be downloaded via rosterdiag, but I'll maintain them here. This also means they are now protected under CreativeCommons Attribution-Noncommercial-Sharealike like the rest of Roster is. So you can use the improved lua parser for your own purposes under the same conditions as you could use the old one.