If you noticed a change in your GPA last weekend, you’re not alone.

In a post on social media on Friday, January 18, U of T’s ACORN team said, “We have identified a problem with the calculation of students’ weighted cumulative grade point averages [CGPAs] for the Fall 2018 session. The ACORN team is working to fix this issue as quickly as possible.”

It remains unclear what exactly the problem was with the calculation. Several students reported having drastic adjustments to their CGPAs, while others said that nothing had changed.

In a statement to The Varsity, U of T spokesperson Elizabeth Church said that the university’s team had been working to find out what had happened and how to fix it.

“We discovered a bug in the GPA calculator program [last] Friday morning,” Church said. “We have been working hard since then to resolve the issue and keep our community updated through social media. The program calculates a student’s cumulative GPA across all courses to date, for their program.”

According to Church, the problem was fixed for most students as of January 22, and the respective registrars were notified. The number of students affected by the bug was not disclosed.