Update 1/29/13: GTasker seems to be working for me now both in Safari and Chrome. It is working for you? Leave a comment below.
Lots of folks have been using a version of GTasker I reposted after the original went down. GTasker a tool to display multiple Google Tasks windows side by side, but now it seems to be non-functional. I don’t have the time to do much troubleshooting on it, but I’d like to empower others to do so, so here’s the skinny:
GTasker has never worked for me in Google Chrome because Chrome obeys X-Frame-Options strictly, which is something Google put in their Google Tasks code to (presumably) prevent it from being embedded. Safari historically hasn’t cared about that, so it ran fine there.
As of last week (1/18/13, I believe) it stopped working in Safari. It’s quite possible it’s an easy fix, but also quite possible that Google has changed something rendering a tool like GTasker impossible or more difficult.
Lots of people have emailed me about working on it, so I’ll leave the comments open here for folks to communicate with each other.