anonymous voting using poll module invalidates cache I am not sure if this is a common problem. I use drupal 7 site with caching enabled. One of my pages is a simple poll. After anonymous voting, all cached pages are invalidated for current user. The cached pages remain in database so after clearing browser cache, current user sees cached pages again. Does poll use some sort of cookie that invalidates cache? How can I avoid such behavior? Thank you
After hours of testing, it looks like the Advanced Poll module does the job. Here is an excerpt about it from the module's project page:

... a replacement to Drupal's poll module and provides multiple voting systems, decision-making tools, and management options.

Voting systems: Basic polls, Approval Voting, Borda Count, and Instant-Runoff Voting.
Vote management: view each user's vote, delete all votes, or restrict the poll to a list of users.
Time management: schedule when to open or close the poll, and choose when to show results.
Choice management: write-in choices, and support for HTML (or other input filter).
Usability: fast Ajax interaction and customizable default settings.
Migration: convert regular Drupal polls into Advanced Polls.