add-on has been updated recently including the suggestion of Christopher Drube from electronic-thingks
regarding colored poll bars; also there was fixed so called "integer definition bug" which we are working on these days updating all the add-ons available. You can see the progress by dates in Downloads area.
So far for the Polls add-on there is a new option $pollBarColors
under addon_polls_options.php which can be disabled if you don't want to use the different color bars; also the following files/codes need to be updated:
You can test how it works on our forums.
Additionally this add-on has been fixed for "integer definition bug" as well, and now it's even possible to upload/move the files with existing file names in the certain folder - extra numerical prefix will be given to such filenames for keeping them available to store.
All templates and *.php files are needed to update if you have this add-on installed.