The Commonwealth Bank (CBA) is 'ecstatic' with the relaunch of its online banking service NetBank, despite a glitch that may have caused problems for some of its customers.

The AU$100 million upgrade to NetBank, which was designed to increase security and expand the Web site's overall functionality, has been on beta test by selected customers for the past two months. The first 50,000 or the bank's 1.9 million customers were transferred to the new system over the weekend.

According to a CBA spokesperson on Monday, some users did experience problems but the overall migration was heralded a success.

"The migration of our first 50,000 customers has passed successfully. We have had a minor issue. One or two users will always experience problems -- but is it symptomatic of a bigger problem? No," said the spokesperson.

One of the users affected by the problems was Ronald Skinner, a ZDNet Australia  reader and CBA customer for more than 15 years.

Skinner said he has been part of the pilot program for the past few months and had not experienced any problems until this weekend.

"The pilot seemed to work fine but it all seemed to go bad this weekend. I only noticed because I transferred some money into my account but Commonwealth Bank is saying there have been no transactions since April 27," said Skinner.

The CBA spokesperson, who could not comment on individual cases, said customers that experience any problems should contact the bank. Meanwhile, the spokesperson said the upgrade schedule will continue as planned and all 1.9 million NetBank customers will be migrated to the new system before July 2005.

In early April, a number of ZDNet Australia  readers who were taking part in the NetBank pilot scheme complained about problems when transferring money using a business account.