Update: As the troubles plaguing GTA Online continue, Rockstar has once again updated its list of known issues as well as suggested a potential workaround for those gamers who are unable to get past the Tutorial race.
While matchmaking load screens timing out, offline and online content mixing on the Jobs list and a lack of objective markers showing in a free-roam session are all freshly discovered problems, the studio has managed to put some others to bed.
An earlier network issue for PlayStation 3 users limiting the number of concurrent users was preventing a lot of people from accessing GTA Online - this has now been resolved. General instability is being addressed and, in the meantime, the studio has decided to turn off the game's microtransactions until things are sorted. You can still earn GTA$ by completing Jobs and other activities, you just can't buy extra cash until the gameplay experience is more stable.
The company is continuing its efforts to resolve the problems. As soon as more news is released about its progress, we'll update this story.
Previous updates and original story follows.
ORIGINAL: Rockstar has extended the list of known issues it's wrestling to resolve, and promised the team is "working around the clock" to get things working smoothly.
In addition to the problems mentioned below, the studio is now attempting to combat errors where jobs won't start or load, miscellaneous network and server-related errors including disconnections, and an error when you instantly fail a mission as soon as it begins.
An accompanying post explains, "We are continuing to look into these issues and are working around the clock on resolving them as quickly as possible. This includes close monitoring of our Support systems, forums, social media, and in-game data to measure traffic along with Community sentiment to ensure ongoing improvements to stability. Please stay tuned for more updates."