Then the internal keyboard started having odd sets of keys going dead.
Then I noticed the laptop was rocking slightly (i.e. not sitting flat)
Bit of Googling suggested the battery can swell and put pressure on the pad.
Apple wanted a fortune to fix it.
Fortunately there's a guy on the high street specialising in Apple repairs (ex Apple techs)
New battery £98 installed. Unfortunately the whilst the keyboard was fine, the trackpad was fooked, so another £40 fitted. I guess not to bad.
