I got the problem that the plug-ins auto eupgrade is asking for FTP user login, accepts the details, then just hangs during the unpacking stage
I tried resetting wp-content to 775 permissions as per another thread - that worked for one plug-in upgrade, then it went back to the same old error.
Changing the actual plugin folder to 775 as well as wp-content, did not fix the problem.
So I tried to get Core Control via the plugin installer ... and ran into an identical problem - asked for login, starts unpacking and hangs
I've searched WP forums and there are hundreds of threads about this - surely the central devs have an "official" fix for it somewhere?
I've got a bucketful of WP installs, on three continents, with a bunch of hosting services, and so far it's just this one install with the issue (it's wp 2.8.4 so latest version, and this issue surfaced as far back as WP 2.5 but is unresolved - that's four major sub-versions it has existed within).