Do you own any games with card drops remaining? Let's take a look! According to your profile you only own 3 games:

• Counter-Strike: Global Offensive - 878 hrs in-game
  
• Post Master - 8.4 hrs in-game
  
• Commandos: Behind Enemy Lines (no play time, but does not have Steam Trading Cards)

So the two games you own with trading cards each have enough play time for you to have earned them all already.

So this isn't a bug or a problem, it's just that "Idling Complete" means that Idle Master has no work to do - since you have no card drops available it's done doing what it's supposed to do.

You can downgrade to 1.1 by downloading the portable zip file of version 1.1[www.steamidlemaster.com].

However - it should be noted that card drop times are set individually by each developer and could vary wildly based on which game your playing. For example the game Awesomenauts takes about 8 hours to drop all cards, and most games will take 1-2 hours (after the initial 2 hour idling) to earn you all of the available card drops. If you're "in-game" on Steam and Idle Master is running, you're getting cards as quickly as possible.

That stuff is all server-side with Valve and makes no difference between versions of Idle Master, or even idling the game without Idle Master such as just sitting in the game's menu.

Nope.

Idling complete means you have no more remaining card drops. I looked at your profile and it appears you only own 1 game (CS:GO) and have 179 hours in-game which is more than enough to earn all of your available card drops for that game.

Idle Master will only idle cards from games which you're entitled to receive.

I'm not a Linux developer, sadly. Initially Idle Master was a simple python script which (luckily for Linux users) was compatible with Linux. Another contributor even created the Linux version of the steam-idle application.

If a Linux developer wants to port the features of the new version over to Linux that'd be great. The software is all open source.

This issue is being investigated and a fix will be released once a solution has been found.

You only have 5 games on Steam, all of which have more than enough play time that you've likely already earned all of your available card drops.

Please read http://psteamcommunity.yuanyoumao.com/tradingcards/faq/

30 seems to be the maximum number of games you can run at once that will actually get recorded by Steam.

Yes, it's safe. The Steam servers that Idle Master reports to don't have any way of knowing whether the game is actually installed or not.

If fact, rather than Valve taking issue with it, I bet they're quite happy with the arrangement - they don't waste gigabytes and gigabytes of bandwidth delivering games that people don't actually want to play, and still reap the benefits of users getting Steam Trading Cards.

I believe this is a false positive in your anti-virus software. Here is a link to the latest scan from VirusTotal[www.virustotal.com], for reference.