What's REALLY going on with Roger Federer??

This has obviously been THE discussion of the year but I was curious to hear what everyone else thinks. I (like most people) were shocked when Roger lost to Djokovic at the Aussie Open SF after their meeting in the '07 US Open Finals. Yet, some were quick to put an asterisk next to Djokovic's Aussie championship after hearing Roger was suffering from mono. When the clay court season arrived, we knew what to expect (clay means Rafa time!) but when Nadal beat Federer like he stole his Nike capri "shorts", we started to scratch our heads a little. Still, with Wimbledon around the corner, we knew Rog would redeem himself...even though Borg picked Rafa to win. We all know what happened on Centre Court (please excuse the fact that I don't want to get into details...still coping with the loss and watching Federer cry during his post-match interview with McEnroe). However, when Federer lost to Gilles Simon last week (even though Simon won at Indy the previous week), I think everyone wanted to REALLY know, is something happening to Roger? Has he finally hit that wall Sampras hit after the 2000 Wimbledon? Is he hurting? Is he fighting with Mirka? What in the world is going on???? What do YOU think?