SCAYT conflicts with FF selection when pasting and undoing

[cjarczew]

SCAYT causes the entire document to be highlighted from the beginning up to the point of the cursor when I highlight text, paste some text and then press CTRL+Z or the undo toolbar option when highlighting from the start of a line.

Browser: FF 24.0

OS: Win 7

Reproducible location: Demo site and nightly build

I also tested with IE9.0.8112.16421(Undo doesn't work so I can't test, reproducible on the demo site) and Chrome 30.0.1599.101 m (Worked fine).

Steps to reproduce:

1. Go to the demo site
2. Enable SCAYT (No spelling mistakes required)
3. Delete the content currently there, for whatever reason I can't reproduce with the default text
4. I type or paste in a few lines of text like so:

Hi there how are you

Hi there how are you

Hi there how are you

Hi there how are you

5. I then highlight part of the line beginning at the start of the line.
6. Paste some content
7. Press CTRL+Z
8. Notice it will now highlight the entire document up to the cursor

[Jakub Ś]

This problem can be reproduced in FF24 from CKEditor 3.1.1 in both CKE 3.x and 4.x.

[Jakub Ś]

Issue for IE was reported in #11056.

[cjarczew]

Thanks for logging the IE one, I was going to do a search for it today but was assuming it was probably already logged. Quite surprised it wasn't noticed before.

[Wiktor Walc]

I'm unable to reproduce it on FF36 / CKEditor 4.4.7 (demo page).

[Jakub Ś]

I'm unable to reproduce this issue as well.