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 runs simply in HTML and Javascript. When the original went down, I was able to recover it using the Wayback Machine on the Internet Archive. I tweaked it slightly and then reposted it primarily for my own use, so I didn’t bother to take out the code and comments that the wayback machine added.
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.
I’ve posted the code (just html+javascript, again) to GitHub to facilitate working on it and give it an online home. As far as I know the code has no explicit license.
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.

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