Quote Originally Posted by takesix
You can obv. only use check/fold in the BB preflop. You are MP1. One of you is lying.
Take six, great observation!!
I emailed them again with this info, and this is what they sent back.

From POKERSTARS.

Hello Mrhappy333,

That is technically true. When you are not in the BB the pre-action box is
simply denoted 'Fold', rather than 'Check/Fold'. I would like to say that in
over 7 billion hands our software has *never* taken an incorrect action like
this.

Unfortunately it is probably too late for you to send us your PokerStars log
files, as they are removed after 24 hours. But if you haven't opened the
software since the incident happened they may still be intact. We can use
the log files to determine exactly where you clicked.

To help you find the log files I've provided step-by-step instructions
below.

The log files we're referring to are called "pokerstars.log.0"
and "pokerstarsupdate.log" and "pokerstarscommunicate.log" if present.
These files can be found in your PokerStars folder on your computer.
If you installed the program to the default directory upon
installation, you can find the files by doing the following:

1. Double click "My Computer" on your desktop
2. Double click "C:" to view your hard drive
3. Double click "Program Files"
4. Scroll down and double click on "PokerStars"
5. Locate "pokerstars.log.0", "pokerstarsupdate.log.0" and
"pokerstarscommunicate.log"
6. Attach these files to an email and send them to
[email protected]

If you cannot find the "PokerStars" folder or you do not see these
files, then you can find them by doing the following:

1. Click on "Start" in the lower left corner of your screen
2. Go to "Find"
3. Move your mouse to the right and click on "Files or Folders..."
4. Type in "pokerstars.log" in the space to the right of "Named:" in
the window that pops up.
5. Click "Find Now".
6. Drag this file into an email to attach it and send it to
[email protected].
7. Repeat this process and enter "pokerstarsupdate.log" in
the "Named:"
field to find the second file to send to us.

If you have any difficulty, please let me know and I will help you.
Just let me know at which step you run into trouble.

Regards,

Adrian
PokerStars Support Team

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I'll email them the info they want, and update you all!