New 25 yr DLC of FBQ 0951+2635 in the red optical passbands from NOT-MT and GLENDAMA+ data. We also show solutions of the fifth-degree microlensing polynomial (thick solid line; see main text for details). For comparison purposes, we include the magnitude differences from VLA data (horizontal dash-dotted line; Jakobsson et al. 2005) and emission lines (horizontal dashed line; see Sect. 3.1). The striped rectangles represent the uncertainties in these two differences.