I am the developper of the wordpress task manager plugin.
Since my release 1.31, blogs which use the plugin don't see that there is an update available.
In the svn, I use the trunk for my file, and I put in "tag" a directory named with the version number. This directory contain all the files of the extension.
I guess a made a mistake with the name of version 1.31 instead of 1.3.1
( i got an error with my client when i try to write 1.3.1).
Thank you for your time and your help