According to the post, there were more bugs introduced by the Windows PC version of the game than expected. Although the developer has "mostly cleared these up now," it will need more time before returning to testing.
"We need Konami to help us out with some things in order to do some Microsoft TRC checks, and thus far they have been completely unresponsive," the post reads.
Skullgirls launched for Windows PC earlier this year. Under Reverge Labs, the game was first released last spring for PlayStation Network and Xbox Live Arcade.