I experienced the same with 0.9.0 when registering UIA and new account names. Had client set to minimum network transaction fee (0.1 BTS). 10's of zero transaction blocks would pass while my transactions were in pending state. Most of these pending transactions were included in blocks with other transactions rather than on their own.

paging @vikram ..

tonyk has experienced similar issues ..

bump. Nobody knows?

I met "pending" frequently during trading. I think pending situation become more frequent recently. What are the causes and can we resolve it?