webdavsaving plugin : race condition

[loic]

when using the webdavsaving plugin the following scenario is rather common

• open foo.com/ tw
• open a new browser tab
• open foo.com/ tw
• edit foo.com/ tw
• save using "save changes"
• go back to the other browser tab
• edit foo.com/ tw
• save using "save changes"

The last save will override the first. It may also happen as follows

• open foo.com/ tw
• edit foo.com/ tw
• save using "save changes"
• open a new tab
• open foo.com/ tw
• the content of foo.com/ tw in the new tab is taken from the cache that contains the older version of the tw
• editing and saving this tw will override the changes in the first version