timer mistakes... is it my computer, connection or just a mistake

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cdapainter
[COMMENT DELETED]
sftac

Usually a connection and/or site (glitch) problem imo.

Not much you can do other than minimize your side of things that might affect your connection (avoid browsing and other programs running).

sftac

cdapainter
[COMMENT DELETED]
NimzoRoy

If the problem persists read this:

http://blog.chess.com/NimzoRoy/diagnosing-and-fixing-internet-problems

BTW you should be able to run iTunes and play chess unless you have very little RAM and/or a really old CPU