SharePoint 2007 has totally integrated SharePoint 2003 and MCMS 2002 to create a wonderful content management experience. However, the error messages it displays are not always as helpful as one would expect. Here is an example:
“This item must be checked out before its properties can be edited.”
Now this might seem pretty simple as you’re reading it, but trust me, while you are editing the page, this error is pretty confusing due to the fact that the editing toolbar – which contains all the required information – isn’t always shown by default.
Basically, whenever you see this message it means that the page has been checked out by someone else. The easiest way to see who has it checked out is to call up the Editing Toolbar by clicking on “Site Actions –> Show Editing Toolbar“. The green bar that appears will clearly note exactly who has it checked out. There you can interact with the relevant user via LCS, or if you have administrative rights, override the checkout and work from there.