We’re sorry… but your query looks similar to automated requests from a computer virus or spyware application. To protect our users, we can’t process your request right now. We’ll restore your access as quickly as possible, so try again soon.Such failures occur, since Google implemented a limit of an average rate of 1 request per 1.725 seconds per API key, rather than waiting for 50,000 requests in one day. This seems to apply also to the Google Map API keys, but I'm not sure regarding that, since I didn't test it.
The error appears - as in my case - if you're creating and deleting things from your Google SVN repository in a very short time. I, for example, deleted a folder immediately after I created it, since I made a typo...Unfortunately the typo happened also the 2nd time :D, so I again had to delete the folder. The 3rd time the error then popped up.
In my case, the solution to this problem, was to disconnect from my ISP, in order to get a different IP address. If you have a static IP address you either have to wait for a certain amount of time (I think at max. up to five days, but I'm not exactly sure about the exact timeframe).
What will for sure work is to contact your ISP and ask for another IP address.