All I have on that matter is what I have read researching what Perry is all about. This is from a source that seems more mainstream than partisan.
1. Perry is not George Bush. Don’t assume that because Bush and Perry served together in the Capitol, or because they’re both Republican Texans who wear boots, the two men have a lot in common. They don’t. As governor, Bush positioned himself as “a uniter, not a divider,” championing education as one of his main priorities. Perry has been the opposite kind of chief executive: dismissive of Democrats and fond of political maneuvers that put the heat on moderates within his own party. And in the legislative session that just wrapped up, he presided over a budget that cut $4 billion from public schools. The cultural differences are striking too. Perry, the son of a Big Country cotton farmer, is at ease with a populist tea party message; W., the scion of a political dynasty, always seemed more comfortable with the country club set. They have followed starkly different paths. When W. began his political career, he had a famous name, access to his father’s huge national fund-raising base, and the backing of the establishment wing of the Republican party. As a late arrival in the Republican ranks, Perry had no fund-raising base and little name identification. He had no choice but to gravitate to the conservative wing of the GOP, where he could prove up his conservative bona fides. Nor is there any love lost between the two men. When Perry ran for lieutenant governor, in 1998, Bush’s camp wanted everyone on the ticket to run positive races; the Perry team defied the order, and ever since, relations have been frosty. There is one other critical difference. Bush lost his first race, for Congress. Perry has won every race he’s ever run.
http://www.texasmonthly.com/2011-08-01/btl.php
I have found no current writings where the Perry and Bush dislike has been mended. Apparently Bush and Rove have one of their nick names for Perry that is derogatory. Rove just today and another Bushie, Dana Parino, unloaded on Perry about his “Treason” remarks. Add to that that the Bushes dislike Sarah Palin and she is friends with Perry, the feud seems likely.
Last week before he entered the race, Perry had an interview where he stated that he was friends with the Bush clan and had called W for advice over the presidential run. It's very clear Perry considers they have a close relationship and he values it.