The Polo gearbox has had a few dramas, and is a running issue in this forum at the moment...
There have been alot of threads on this, and there is also a recall out on the gearbox too.

http://www.vwwatercooled.org.au/newf...arbox+Problems
http://www.vwwatercooled.org.au/newf...arbox+Problems
http://www.vwwatercooled.org.au/newf...arbox+Problems
http://www.vwwatercooled.org.au/newf...arbox+Problems

These may help, but in regards to the recall, take your car into the dealer, quote him the VIN, and he should be able to tell u whether the car need the recall work done or not.