The network drive has been used for many years, and co-workers are using it today just fine.
The crash happened after my PC restarted, and I was re-mapping the network drive as I usually do.
Problem Event Name: APPCRASH
Application Name: explorer.exe
Application Version: 6.1.7601.17567
Application Timestamp: 4d672ee4
Fault Module Name: StackHash_423a
Fault Module Version: 6.1.7601.18247
Fault Module Timestamp: 521eaf24
Exception Code: c0000374
Exception Offset: 00000000000c4102
OS Version: 6.1.7601.2.1.0.256.1
Locale ID: 1033